In the United States, a government-funded preschool program for impoverished children.

(chiefly US, idiomatic) A warning or call to pay attention; an advisory notice; a notice of what is to happen; a holler.

With head directly above the neck, eyes front. / Alert; vigilant

The end of a mop, to which the thrums or rags are fastened. / (US) A clamp for holding the thrums or rags of a mop.

(informal) The person in charge; the highest-ranking person in an organization.

Alternative spelling of headcase

Alternative spelling of headcase / Used other than figuratively or idiomatically: see head, case.

The hub of a propeller / The central part of a propeller, into which the blades fit

(idiomatic) To rapidly reach a turning point or climax. / (idiomatic) To suddenly reveal that which has lain latent for a time.

The highest ranking coach of a coaching staff.