To become greater in any respect; become enlarged, extended, or multiplied; grow or advance in size, quantity, number, degree, etc.; augment; multiply; wax, as the moon.To make greater in any respect; enlarge or extend in bulk, quantity, number, degree, etc.; add to; enhance; aggravate: opposed to diminish.n. A growing larger, as in size, number, quantity, degree, etc.; augmentation; enlargement; extension; multiplication.n. The amount or number added to the original stock, or by which the original stock is augmented; increment; profit; interest; produce; issue; offspring.n. In astronomy, the period of increasing light or an increasing luminous phase; the waxing, as of the moon.