cohabit
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**co·hab·it** /ˌkəʊˈhæbɪt/ *v* [I(with)] *fml* (of unmarried people) to live together as though married: *Ann and Peter have been cohabiting/Ann has been cohabiting with Peter for years.* **—~ation** /kəʊˌhæbɪˈteɪʃən/ *n* [U]
**Co·han**, George M. /'kəʊhæn/ (1878-1942) a US actor, writer, and songwriter, who wrote several musical plays and many well-known songs, including *Give My Regards to Broadway* and *I'm a Yankee Doodle Dandy*
**Co·hen**, Leon·ard /'kəʊən, 'lenədǁ-ərd/ (1934-) a Canadian songwriter and poet, who first became popular in the 1960s, and whose songs include *Suzanne* (1968) and *I'm Your Man* (1988). He has a very low singing voice and his early songs were known for being very sad and DEPRESSING.
**co·here** /kəʊ'hɪə/ *v* [I] *fml* **1** to stick together; be united: *to make two surfaces cohere* **2** to be reasonably and naturally connected, especially in thought; show coherence: *an argument that simply fails to cohere*
**co·her·ence** /kəʊ'hɪərəns/ also **co·her·en·cy** /-rənsi/ *n* [U] natural or reasonable connection; an orderly relationship between parts, especially in speech, writing, or argument; CONSISTENCY
**co·her·ent** /kəʊ'hɪərənt/ *adj* (especially of speech, writing, or argument) naturally or reasonably connected and therefore easy to understand; showing coherence; CONSISTENT: *to construct a coherent argument | They seem to have no coherent plan for saving the company.* $\rightarrow$ opposite INCOHERENT **—~ly** *adv*
**co·he·sion** /kəʊ'hiːʒən/ *n* [U] **1** the act or state of sticking together tightly: *We need greater cohesion in the party if we're going to win the next election.* **2** *tech* close relationship, based on grammar or meaning, between different parts of a sentence or between one sentence and another. **—~sive** /'hiːsɪv/ *adj*: *cohesive forces in society | a cohesive group* **—~sively** *adv* **—~siveness** *n* [U]
**co·hort** /'kəʊhɔːtǁ-hɔːrt/ *n* **1** [+sing./pl. v] *tech* any group of people who share some common quality, especially those of the same age, in a study of the population **2** [+sing./pl. v] (in the ancient Roman army) a group of between 300 and 600 soldiers under one commander **3** *often derog, especially AmE* a companion; ASSOCIATE: *the mayor and his disreputable cohorts*
**COI** /ˌsiː əʊ 'aɪ/ *abbrev.* for CENTRAL OFFICE OF INFORMATION
**coif** /kɔɪf/ *n* a close-fitting cap covering the top, sides, and back of the head, worn by some NUNS (=members of female religious groups)
**coif·feur** /kwɑː'fɜːǁǁ kwaː-/ *n fml* or *pomp* a HAIRDRESSER
**coif·fure** /kwɑː'fjʊəǁ kwaː-/ *n fml* a way of arranging or wearing the hair; HAIRSTYLE **—~fured** *adj*
**coil¹** /kɔɪl/ *v* [I+adv/prep; T (UP)] to (cause to) wind or twist round and round to form a ring or SPIRAL: *The snake coiled around the tree/coiled itself into a ball. | a coiled spring*
**coil²** *n* **1** a connected set of rings or twists into which a rope, wire, length of hair etc can be wound; continuous circular shape made by winding: *a coil of rope | her heavy coil of hair* **2** *tech* an electrical apparatus made by winding wire into a continuous circular shape, used for carrying an electric current **3** a coil of metal or plastic which is fitted inside the UTERUS (=the child-bearing organ of a woman) to prevent her from having children; IUD
**coin¹** /kɔɪn/ *n* **1** a piece of metal, usually flat and round, made by a government for use as money: *I changed a £5 note/a $5 bill because I needed some coins for the ticket machine. | He paid me in coin. | Let's toss/flip a coin to decide who should go first - do you want heads or tails?* **2 pay someone in their own coin** *especially BrE fml* to treat someone in the same (bad) way as they have treated others **3 the other side of the coin** the other or opposite side of an argument, situation etc: *These workers earn a lot more than us, but the other side of the coin is that their job is much more dangerous.* **4 two sides of the same coin** used in order to say that two problems or situations are so closely related that they are really just two parts of the same thing: *School life and home life are two sides of the same coin for children. | It is becoming apparent that political unrest and religious fundamentalism are two sides of the same coin.*
**coin²** *v* [T] **1** to make (coins) from metal **2** to invent (a word or phrase): *Who coined the word 'nuke'?* **3 coin money** also **coin it** — *BrE infml* to earn a lot of money very quickly: *That restaurant must be coining money—it's always full.* **4 to coin a phrase** *humor* (used for excusing yourself when you have used a very well-known and ordinary phrase): *Many hands make light work, to coin a phrase.* **—~er** *n*
**coin·age** /'kɔɪnɪdʒ/ *n* **1** [U] the system of coins used in a country: *decimal coinage* **2** [C] a word or phrase recently invented: *The word 'nuke' is a fairly recent coinage.* **3** [U] **a)** the act of making coins **b)** the act of inventing new words or phrases
**co·in·cide** /ˌkəʊɪn'saɪd/ *v* [I(with)] **1** to happen at the same time or during the same period: *Her holidays don't coincide with mine. | The Queen's visit has been planned to coincide with the school's 200th anniversary.* **2** (of ideas, opinions etc) to be in agreement: *Our interests happened to coincide.*
**co·in·ci·dence** /kəʊˈɪnsɪdəns/ *n* **1** [C;U] (an example of) the happening by chance at the same time or place of two or more events which are similar or related: *What a coincidence that I was in London at the same time as you! | By sheer coincidence/By a curious coincidence, my husband and I have the same birthday. | It is no coincidence that his car was seen near the bank at the time of the robbery.* **2** [U] *fml* the condition or fact of coinciding: *coincidence of opinions*
**co·in·ci·dent** /kəʊˈɪnsɪdənt/ *adj* **1** [(with)] *tech* or *fml* existing or happening in the same position and time **2** *fml* being in complete agreement
**co·in·ci·den·tal** /kəʊˌɪnsɪ'dentl/ *adj* resulting from a coincidence: *It was purely coincidental that we were travelling on the same plane.* **—~ly** *adv*: *Coincidentally, he and I were on the same plane.*
**Coin·treau** /'kwɒntrəʊǁkwɑːn'trəʊ/ *trademark* a type of colourless French LIQUEUR (=a sweet and very strong alcoholic drink), which tastes of oranges and is usually drunk from a small glass after a meal
**coir** /'kɔɪə/ *n* [U] the rough hair outer covering of the COCONUT used for making ropes, mats etc
**co·i·tus** /'kəʊɪtəs, 'kəʊɪtəs/ also **co·i·tion** /kəʊ'ɪʃən/ *n* [U] *med* or *fml* the act of sex; SEXUAL INTERCOURSE **—coital** /'kɔɪtl, 'kəʊɪtl/ *med adj*
**coitus in·ter·rup·tus** /ˌkəʊɪtəs ɪntə'rʌptəsǁˌkəʊɪ-/ *n* [U] *med fml* the practice in which a man takes his sex organ out of the woman's sex organ before ejaculating (EJACULATE), to prevent the woman having a baby
**coke¹** /kəʊk/ *n* [U] the solid substance that remains after gas has been removed from coal by heating, which is burnt as a FUEL
**coke²** **1** also **Coke** — *trademark* for COCA-COLA **2** *n* [U] *infml* COCAINE
**col** /kɒlǁkɑːl/ *n* a low place between two high points in a mountain range; mountain PASS
**Col.** *n written abbrev.* for COLONEL
**co·la** /'kəʊlə/ *n* [C;U] (a glass of) a non-alcoholic sweet carbonated dark-coloured drink: *Two colas, please. | What kind of cola is this?* $\rightarrow$ see also DIET COLA
**COLA** /'kəʊlə/ *n abbrev.* for cost of living adjustment; in the US, an increase to people's wages, or SOCIAL SECURITY and WELFARE payments to prevent them being affected by INFLATION (=the gradual rise in the price of goods etc)
**col·an·der** /'kʌləndə, 'kɒ-ǁ'kʌ-, 'kɑː-/ also **cullender** *n* a metal or plastic bowl with many small holes in the bottom, used for separating liquid from food: *Strain the peas in the colander.*
**Col·by** /'kəʊlbi/ *trademark* a type of orange-coloured cheese sold in the US
**Col·ches·ter** /'kəʊltʃɪstəǁ-tfestər/ a town in Essex, southeast England. It was the Roman capital of Britain and claims to be the oldest town in the UK. The University of Essex is there.
**cold¹** /kəʊld/ *adj* **1** having a low or lower than usual temperature; not warm: *cold water | a cold wind | It's a cold day for July, isn't it? | It's getting cold - let's shut the window. | I'm (feeling) cold; I should have put a coat on. | My coffee has gone cold. | My toes are as cold as ice.* | (fig.) *She went cold with fear when she heard the footsteps outside her door.* $\rightarrow$ opposite HOT **2 a)** not cheerful or friendly: *a cold handshake/greeting | She seemed rather cold towards the*