noun

• The process of making something square; squaring.
• (mathematics) The act or process of constructing a square that has the same area as a given plane figure, or of computing that area.
• (mathematics, numerical analysis) The calculation of a definite integral by numerical means.
• (mathematics, mathematical analysis) The act or process of solving an indefinite integral by symbolic means.
• (astronomy) A situation in which the directions of two celestial bodies (or a celestial body and the Sun) form a right angle from the perspective of the observer.
• (physics) The condition in which the phase angle between two alternating quantities is 90°.
• (art) A painting painted on a wooden panel.