Idioms
An idiom is a group of words, or in other words, a phrase that has a meaning different from the literal meaning of the words in it.
Idiom:
launch forth (on something)
Meaning:
to start out on something
Example:
Our boss launched forth on a long criticism of how we are doing our jobs.
List of common idioms, their meanings and examples of their usage in sentences
The language peculiar to a people or to a district, community, or class