An expression in the usage of a language that is peculiar to itself either in having a meaning that cannot be derived from the conjoined meanings of its elements or in its grammatically atypical use of words.
Idiom:
keep pace (with someone or something)
Meaning:
to go as fast or go at the same rate as someone or something
Example:
It is difficult to keep pace with the other students but somehow I manage.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is a type of phrase or expression that has a meaning that can't be deciphered by defining the individual words.