ziplockhttp://www.oed.com/dictionary/ziplock_n%3Ftab%3Dmeaning_and_useziplock, n.
Revised 2021

ziplocknoun

Originally U.S.
  1. I.
    Compounds.
    1. I.1.
      1928–
      As a modifier. Designating something which closes or fastens by means of a zip. Also: designating a bag, etc., with a lockable zip.
      Somewhat rare in comparison with sense I.2.
      1. 1928
        Pencil Cases, zip lock closing.
        Lake County Times (Hammond, Indiana) 4 September 3 (advertisement)
      2. 1952
        Bond's famous zip-lock split-leather bag... Appointed with slide zipper that locks.
        Washington Post 5 June 4/6 (advertisement)
      3. 1973
        Winter jackets... They feature snap over zipper fronts and zip lock pocket flaps to protect from snow or water.
        Daily Tribune (Wisconsin Rapids) 2 October 18 (advertisement)
      4. 1998
        The zip lock fastening system for the cover is the industry's easiest access cover.
        Daily News (N.W. Florida) 15 September a5/2 (advertisement)
    2. I.2.
      1968–
      As a modifier. Also with capital initial. Designating a sealable plastic bag with a two-part strip along the opening that can be pressed together, or fastened with a zip-like slider, and readily reopened. Chiefly in ziplock bag.
      In form Ziploc, a proprietary name.
      1. 1968
        New Ziploc Food Storage Bags have a built-in moisture-tight seal that zips open, zips shut!
        Holland (Michigan) Evening Sentinel 10 September 12 (advertisement)
      2. 1977
        Spenser rummaged among the Ziploc bags in his briefcase.
        C. McFadden, Serial (1978) l. 107/1
      3. 1994
        My first-aid kit with everything that needs to stay dry packed in zip-lock freezer bags.
        J. Milne, Getting Back iv. 42 (caption)
      4. 2015
        We both look down at his hand and he's carrying weed in a Ziploc bag.
        A. Silvera, More Happy than Not 18
  2. II.
    Simple uses.
    1. II.3.
      1956–
      A lock or fastener which prevents a zip from opening; a lockable zip.
      Somewhat rare in comparison with sense II.4, and perhaps not always as a fixed collocation.
      In quot. 1947: the brand name of a padlock which is fastened or opened by sliding the case of the lock along a long, notched steel shackle.
      1. [1947
        A new locking principle makes the Ziplock a handy gadget to provide security for bicycles, duffel bags, golf bags and similar equipment.
        Newburyport (Massachusetts) Daily News 3 October 5/2 (advertisement) ]
      2. 1956
        Feather-lite luggage..for every travel or vacation need... Zip-locks keep packables safe and snug.
        Chester (Pennsylvania) Times 1 August 7/2 (advertisement)
      3. 2005
        Purses... Chic design combined with secure zip locks.
        Times 13 August 46/2
    2. II.4.
      1974–
      Also with capital initial. A sealable plastic bag with a two-part strip along the opening that can be pressed together, or fastened with a zip-like slider, and readily reopened; a ziplock bag (see sense I.2).
      In form Ziploc, a proprietary name.
      1. 1974
        Big Saran Wrap! Qt. size Ziplocs!
        News-Palladium (Benton Harbor, Michigan) 14 March 28 (advertisement)
      2. 1984
        Jankovitch grabs the car keys, the German knife, wallet, cash and by reflex, the ziploc of powder.
        M. A. Jarman, Dancing nightly in Tavern 2
      3. 2010
        If you are using a ziplock, make sure you expel all the air before stowing it.
        Trail Spring 44/1

Originally published as part of the entry for zip, int. & n.¹

ziplock, n. was revised in March 2021.

ziplock, n. was last modified in December 2023.