Definition of quirk

• n. - A sudden turn; a starting from the point or line; hence, an artful evasion or subterfuge; a shift; a quibble; as, the quirks of a pettifogger.
• n. - A fit or turn; a short paroxysm; a caprice.
• n. - A smart retort; a quibble; a shallow conceit.
• n. - An irregular air; as, light quirks of music.
• n. - A piece of ground taken out of any regular ground plot or floor, so as to make a court, yard, etc.; -- sometimes written quink.
• n. - A small channel, deeply recessed in proportion to its width, used to insulate and give relief to a convex rounded molding.