To ascertain or establish by observation, inquiry, or reflection; to investigate. Cf. sense 23b. transitive. Usually with interrogative clause as…

With sentence as obj.: To prove, try to find out, see.

transitive. To detect or apprehend (a person) in an offence; to uncover (an illicit action); (also) to discover the identity of (a person); = to fin…

To get to know, ascertain, find out. Obsolete.

To light (up)on. literal and figurative.

transitive. To seek or search out; to discover. Cf. grope, v. 5.

To find out or discover (as the solution of a problem or riddle); to come to understand. Obsolete.

transitive. To discover by attention, scrutiny, study, etc.; to solve, explain. Also: to devise, invent. Obsolete.

transitive. To search out; to explore. Obsolete.

transitive. With up. To search out. Obsolete. rare.

transitive. To come upon, find; to find out, discover. (Obsolete except in reference to the Invention of the Cross n. at invention, n. 1b)

transitive. To make apparent or clear; to find out, discover. Obsolete.

Chiefly with out: To get by artifice or patient effort; to ascertain, elicit (a fact or opinion). Const. from, out of. Cf. Latin expiscari.

transitive. To gain knowledge of, learn. Obsolete. rare.

gen. To obtain sight or knowledge of or become aware of (a thing or person previously unknown or… transitive. With simple object.

to grope out: to find by feeling about. Chiefly figurative. To find by tentative effort; to search out.

transitive. To find out. (In later use chiefly poetic.)

transitive. To ‘fish out’; hence, to find out by scrutiny. Occasionally with sentence as object.

transferred. To discover or discern. Obsolete. rare.

to learn out: to find out, discover. Now dialect.

To find out, discover. Also intransitive.

transitive. To discover or find out for oneself (something previously concealed or unknown, as a person's true character, an undiscovered fact…

To find out or learn for a certainty by experiment, examination, or investigation; to make sure of, get to know. (The only current use.)

slang. transitive. To observe; to take particular notice of; to watch; also, to find out or discover by observation, to detect. Also absol. or intrans…

figurative. transitive. Originally: †to disturb, disarrange (obsolete). In later use: to search out or rummage for; to find by rummaging. Chiefly…

to get a line on, to acquire information about (a thing), to come to know. So to give (someone) a line on. colloquial (originally U.S.).

In weakened use: to determine or ascertain; to find out.