Idioms
An idiom is a type of phrase or expression that has a meaning that can't be deciphered by defining the individual words.
Idiom:
paper over the cracks (in/of something)
Meaning:
to try to hide the faults or difficulties of something
Example:
Our boss tries to paper over the cracks in our office and will not deal with staff problems.
List of common idioms, their meanings and examples of their usage in sentences
A group of words which have a different meaning when used together from the one they would have if you took the meaning of each word separately.