comparative degree

Short definition from Wiktionary

Noun

1. 1
   The degree of comparison of an adjective or adverb used when comparing two entities in terms of a certain property or a certain way of doing something. In English, the comparative of superiority is formed by adding the suffix -er or the word more (e.g. bigger, more fully); the comparative of equality, by adding the word as (e.g. as big, as fully); the comparative of inferiority, by adding the word