A fundamental, generic term used when referring to the measurement (count, amount) of a scalar, vector, number of items or to some other way of denominating the value of a collection or group of items.

in large amounts or numbers

plural of quantity

Obsolete spelling of quantity

(physics) A physical property that can be measured or calculated from other physical property and expressed as the product of a numerical value and a physical unit.

(idiomatic) A person or thing whose nature or value is a mystery. / Used other than figuratively or idiomatically: see unknown, quantity.

(physics) a quantity lacking dimension, a pure number.

(linguistics) A vowel’s duration of articulation; its length.

A person who calculates the cost of materials and labour on a construction project based on an architect's plans.

A person or thing whose nature or value is well known.