transitive. To ascertain or attain by mental effort; to discover by study or attention.

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

transitive. To seek to understand (a subject, situation, etc.) through examination, study, or analysis; to examine, research, inspect; (now) esp.…

transitive. To discover by attention, scrutiny, study, etc.; = to find out 2 at phrasal verbs.

figurative. To discover or find out, to guess or suspect, by close study or observation. Also with out.

transitive. To engage in research upon (a subject); to investigate or study closely.

intransitive. To search or probe into an idea, theme, etc. Obsolete.

transitive. = excude, v.

transitive. To investigate or study systematically; to do research on. Cf. to work out 9 at phrasal verbs 1, to work up 4d at phrasal verbs 1. rare.

transitive. To go deeply into, to search the depths of (a subject of study). (A Gallicism.)