1. (adj)zero, 0, nought, cipher, cypher a mathematical element that when added to another number yields the same number Synonyms: nought, zero, zip, goose egg, naught, aught, nothing, cipher, nix, zippo, nil, nobody, secret code, nonentity, cryptograph, cypher, zilch, zero point, nada, null Antonyms: ordinal
2. (adj)zero, 0 indicating the absence of any or all units under consideration Synonyms: zero, zero(a) Antonyms: ordinal