(slang, vulgar) Not quite right mentally: perverted, stupid, or mentally ill.

A vertical panel, either plain or upholstered, attached to the head of a bed. / (nautical) A panel, usually of metal, attached to the head of a fore-and-aft sail for additional strength.

Characterized by vague or confused thinking: foolish, dull-witted, semi-conscious.

(idiomatic) To be particularly, especially uncannily, observant; a perceived ability to see in all directions at once.

With the head in front; headlong. / Rashly; precipitately; without deliberation; hastily.

With the head in front; headlong.

Adjectival or attributive form of angels dancing on the head of a pin.

(figuratively) The subject of arcane intellectual speculation; used as an example subject of enquiry the pursuit of which is of no value.

Alternative spelling of clearheaded

The act of counting how many people are present in a group. / The number of people present in a group or employed by a company.