Alternative spelling of overzealous

(computing, idiomatic) (of vulnerability) newly discovered, and therefore still not fixed and possibly exploited by hackers or other criminals

(computing, idiomatic) vulnerability that has been discovered recently, and is yet unpatched or unmitigated; zero-day vulnerability

plural of zebra fish, an alternative spelling of zebrafish

plural of zero-based budget

plural of zebra finch

plural of zero tensor

(Indo-European linguistics) In Proto-Indo-European linguistics, an ablaut form of a root characterized by the absence of the basic ablauting vowel phonemes */e/ and */o/.

Abbreviation of New Zealand.

(Buddhism) The Zen denomination of Buddhism.