(1):

(n.) A looking after; a regard to.

(2):

(n.) Any object or truth discerned by direct cognition; especially, a first or primary truth.

(3):

(n.) Direct apprehension or cognition; immediate knowledge, as in perception or consciousness; - distinguished from "mediate" knowledge, as in reasoning; as, the mind knows by intuition that black is not white, that a circle is not a square, that three are more than two, etc.; quick or ready insight or apprehension.