Intellectual acuteness, shrewdness.

Internal sight, mental vision or perception, discernment; in early use sometimes, Understanding, intelligence, wisdom. Obsolete.

cunning; astuteness, sagacity.

Good or great mental capacity; intellectual ability; genius, talent, cleverness; mental quickness or sharpness, acumen. archaic.

Shrewdness, wisdom. Obsolete.

Prudent conduct; politic or expedient behaviour; prudence, shrewdness, sagacity. Now chiefly in bad policy, good policy, etc. Formerly also…

The action of discern, v.; perceiving; distinguishing; an instance of this.

= policy, n.1 in various senses. Obsolete.

Insight, perception. Obsolete.

The capacity or action of perceiving; mental or physical perception; discernment, wisdom, understanding; awareness, sense.

esp. Natural capacity to learn or understand; intelligence, quick-wittedness, readiness.

Acuteness of mental discernment; aptitude for investigation or discovery; keenness and soundness of judgement in the estimation of persons and…

Sharpness or keenness of thought, understanding, or feeling; perceptiveness, shrewdness.

Quickness and alertness of the mind, intellect, etc.; mental dexterity.

Sharpness of wit, quickness or penetration of perception, keenness of discrimination; (now esp.) the ability to make good judgements and decisions.

In singular and (occasionally) in plural. An ability to see things clearly, esp. more clearly than most people; the quality of being observant…

Sprightliness, vivacious wit in conversation or composition (see Littré, Esprit 15). Formerly in wider sense: Cleverness, ‘brains’, ‘nous’ (see…

Readiness or clarity of intellectual apprehension; shrewdness, sharp-wittedness.

figurative. Of persons, or their mental faculties or actions: Profundity, penetration, sagacity.

The action or capacity of penetrating something with the mind; keenness of perception or understanding; insight, acuteness, discernment.

The quality or state of being knowing, in various senses.

Sagacity or keenness of mental perception or discrimination; astuteness in practical affairs.

The quality of being piercing or penetrating; keenness, sharpness.

The faculty or power of discerning or understanding clearly; perspicacity, insight; good judgement. Now frequently with implication of…

The quality of being sagacious.

Mental sharpness, shrewdness, or cunning; also, shrillness.

Perceptiveness; perception; the power of perception.

Intellectual sharpness; acuteness: shrewdness.

The quality of being cute.

In a more general sense: Direct or immediate insight; an instance of this.

Collectedness, composure, clearness of thought; an instance of this. Now rare.

The quality of having great foresight or judgement; discernment, shrewdness, intelligence.

The quality of being perceptive; discernment, intelligence, insight.

Good sense; acumen; judgement. Now rare.

figurative. Incisiveness, keenness of action or apprehension.

The quality of being incisive: usually in sense 4 of the adjective.

Penetrative quality, power of penetration.

Power of ‘scent’, sagacious perceptiveness, instinctive discernment. Also in weakened senses: (a) special aptitude or ability; (b) liking, taste…

the quality or condition of being hard-boiled (chiefly in sense 2).

Originally and chiefly North American. In plural. Intelligence, esp. natural intelligence; cleverness, acumen, nous; wits. Chiefly with the.

The quality of being spiky or sharp-pointed.

Know-how, savoir faire; understanding, ‘nous’.