Webster's Revised Unabridged Dictionary · 1913

Concept

Concept , noun

[Latin conceptus (compare neut. conceptum fetus), past participle of concipere to conceive: compare French concept. See Conceit.]

An abstract general conception; a notion; a universal.
The words conception, concept, notion, should be limited to the thought of what can not be represented in the imagination; as, the thought suggested by a general term. — Sir W. Hamilton