Insufficient or inadequate in amount.
Lacking something essential; often construed with in.
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.
Having a tendency to fuss, cry, or be bad-tempered/ill-tempered (especially of babies).
Anxious or particular about petty details; hard to please.
Having much unnecessary detail or decoration.