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

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

(marketing, finance) A type of incentive offered to a purchaser which results in a decreased cost of goods or materials per unit when purchased in greater numbers.

plural of quantity discount

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

the theory that changes in prices and the value of money vary with changes in the amount of money in circulation

A list, prepared by a quantity surveyor, of the quantities of materials needed for a project.

plural of quantity of motion

plural of bill of quantities

plural of physical quantity