Lacking something essential; often construed with in.
Insufficient or inadequate in amount.
Of a number n, Having the sum of divisors σ(n)<2n, or, equivalently, the sum of proper divisors (or aliquot sum) s(n).
A person who is deficient.
Not complete; not finished
Of a flower, wanting any of the usual floral organs.
A designation of being incomplete.
A multipart file posted to Usenet that is incomplete and thus unusable.
A multiplayer game that is abandoned because one player disconnects.