zip

n. [ Imitative. ] 1. A hissing or sibilant sound such as that made by a flying bullet. [ Webster 1913 Suppl. ]

2. a quantity of no importance. [ informal ]
Syn. -- nothing, nihil, nichts, nix, nada, aught, cipher, cypher, goose egg, naught, nil, zero, zilch. [ WordNet 1.5 ]

3. a device for locking together two toothed edges by means of a sliding tab.
Syn. -- slide fastener, zipper, zip-fastener. [ WordNet 1.5 ]

n. a full nine-digit zip code. See zip code. [ PJC ]

n. [ zone improvement plan. ] Any one of a set of numbers assigned by the United States Postal Service to designate a particular postal delivery area. One or more zip codes are assigned to each post office. The numbers initially had five digits (the initial code), indicating state and post office. Later, four more optional digits were added (the expanded code) indicating the box number or delivery route. The full set of nine digits is also referred to as zip + 4. The code is appended in an address to the line bearing the city and state names, as in “Plainfield, NJ 07062”. [ Also spelled ZIP code and Zip code. ] [ PJC ]

v. t. to affix a zip code to (an address or a letter). [ PJC ]

n. 1. a device for locking together two toothed edges by means of a sliding tab.
Syn. -- slide fastener, zip, zipper. [ WordNet 1.5 ]

prop. n. A natural family of cetaceans comprising the beaked whales; in some esp. former classifications included in the family Physeteridae.
Syn. -- family Ziphiidae, Hyperodontidae, family Hyperodontidae. [ WordNet 1.5 ]

n. (Zool.) See Xiphioid. [ 1913 Webster ]

n. 1. a device for locking together two toothed edges by means of a sliding tab.
Syn. -- slide fastener, zip, zip-fastener. [ WordNet 1.5 ]