Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.
Idiom:
kind of
Meaning:
moderately, somewhat, more or less
Example:
I was kind of tired when I arrived home last night.
List of common idioms, their meanings and examples of their usage in sentences
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.