Idioms
An idiom is defined as - a group of words whose meaning is different from the meanings of the individual words.
Idiom:
by and by
Meaning:
before long, after some time has passed
Example:
By and by, all of the family moved back to the city.
List of common idioms, their meanings and examples of their usage in sentences
Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.