Idioms
An idiom is a group of words, or in other words, a phrase that has a meaning other than its literal meaning of the words in it.
Idiom:
beside oneself (with something)
Meaning:
to be very upset or excited about something
Example:
The boy was beside himself with joy after winning the contest.
List of common idioms, their meanings and examples of their usage in sentences
An idiom is defined as - a group of words whose meaning is different from the meanings of the individual words.