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.
Lacking depth of character or understanding; lacking substance or significance.
Not thorough, deep, or complete; concerned only with the obvious or apparent.
Existing, occurring, or located on the surface.
Appearing to be true or real only until examined more closely.
Situated or occurring on the skin or immediately beneath it.
Two-dimensional; drawn on a flat surface.
Denoting a quantity of a material expressed in terms of area covered rather than linear dimension or volume.
A surface detail.