A question mark.

(informal) A quotation mark; a quote.

A marking in a tree or other piece of wood created with a tomahawk, often used to denote property boundaries in frontier settings.

(engineering) A symbol used to mark the center of a circle or partial circle on an engineering drawing.

(linguistics) A symbol used to indicate tones in tonal languages.

A stigma of shame

(archaic) An identifying marking, usually in coded form and handwritten in indelible ink on an inconspicuous area of a garment, widely used until the mid-20th century as an organizing aid by merchants who cleaned and pressed clothing.

(figuratively) To succeed or work very well; to do the trick.

beside the point; irrelevant

(chiefly New South Wales in Australia, colloquial) The permission to leave early (from class, school, workplace, etc.) before the scheduled end time; an early finish.