To issue a challenge.

(formal) To the end, or until death.

(idiomatic) Relevant or pertinent; succinct; specific. / Used other than figuratively or idiomatically: see to, point.

(idiomatic) As purchased or as commonly available, without modification or customization.

(Britain, Australia, New Zealand, childish) naked or nude

(intransitive) To convert to Catholicism.

(baseball, of the ball) While in the air, without having touched the ground. / (idiomatic) Spontaneously or extemporaneously; done as one goes, or during another activity.

In earnest; sincerely; with one's full feeling.

(idiomatic, chiefly Scotland, Ireland, Liverpudlian, slang) a stupid person; a nutcase

(idiomatic) To disturb the status quo or go against rules or conventions, as in an effort to get attention.