‘Having the power to enter far into a subject’ (Johnson), penetrating, profound; having profound knowledge, learning, or insight.

Of a person: characterized by intellectual depth; having great insight into or knowledge of something; very learned. Formerly also: †crafty, cunning…

Having high intellectual capacity; able, talented, possessed of genius. Obsolete in general sense.

of (a) great, deep,etc., reach: of great, deep, etc., knowledge or power of comprehension. Obsolete.

That sees or has seen deeply into things.

having a breast or mind as deep as a gulf.

Open to or tolerant of a broad range of ideas; open-minded, liberal.

Of a person, esp. a child or pupil: quick-witted, clever; intelligent, astute.

= strong-minded, adj. 1. Also: having a powerful intellect.

Of or relating to intellectual power or genius (genius, n. 9); characterized by genius. Now rare.

Having great knowledge; deep, insightful, astute. Cf. shrewd, adj. 13.

Having greater than normal intelligence; very or highly intelligent.