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.
Believing in or seeking a minimal state; seeking to minimize or reduce to a minimum.
One who believes in or seeks a minimal state; one who seeks to minimize or reduce to a minimum.