INCREASE meaning: 1. to become larger in amount or size, or to make something do this: 2. a rise in the amount or…. Learn more. INCREASE definition: to make greater, as in number, size, strength, or quality; augment; add to. See examples of increase used in a sentence. Use this percentage increase calculator to find the percent change between two values, calculate increases or decreases, and see the working. Percentage increase calculator finds the increase from one value to another as a percentage of the first value. Shows you how to find percentage increase with percent increase formula. Percentage increase calculator calculates the increase of one value to the next in terms of percent. 1. to make greater, as in number, size, strength, or quality; augment: to increase one's knowledge. 2. to become greater, as in number, size, strength, or quality. 3. to multiply by propagation. n. 4. growth or augmentation in size, strength, or quality. 5. the act or process of increasing. INCREASE definition: 1. to become larger in amount or size, or to make something do this: 2. a rise in the amount or…. Learn more. To increase means to make greater, as in quantity, extent, degree: to increase someone's salary; to increase the velocity; to increase the (degree of ) concentration. The meaning of INCREASE is to become progressively greater (as in size, amount, number, or intensity). How to use increase in a sentence. Synonym Discussion of Increase. Some common synonyms of increase are augment, enlarge, and multiply. While all these words mean to make or become greater, increase used intransitively implies progressive growth in size, amount, or intensity; used transitively it may imply simple not necessarily progressive addition.