Suitable, proper. / Adapted to a purpose or environment. / In good shape; physically well. / (Britain, informal, chiefly slang) Sexually attractive; good-looking; fanciable. / Prepared; ready.

(transitive) To be suitable for. / (intransitive) To have sufficient space available at some location to be able to be there. / (transitive) To conform to in size and shape.

The degree to which something fits. / Conformity of elements one to another. / The part of an object upon which anything fits tightly.

(archaic) A section of a poem or ballad.

A seizure or convulsion. / (medicine) A sudden and vigorous appearance of a symptom over a short period of time. / A sudden outburst of emotion. / A sudden burst (of an activity).

(intransitive, medicine) To suffer a fit.

(African-American Vernacular, Southern US, dated) simple past tense and past participle of fight; fought.

simple past tense of fit ("to tailor, to change size") / (regional, sometimes proscribed) simple past tense of fit (other senses) / past participle of fit (“to tailor, change size”)

(of a kitchen, bathroom, etc.) Incorporating all of the fittings into connected units.

present participle of fit / (informal, US, with infinitive) Getting ready; preparing.