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:
hold forth on/about (something)
Meaning:
to speak in public, to talk about something
Example:
My boss was holding forth about taxes last night when I saw him in his office.
List of common idioms, their meanings and examples of their usage in sentences
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.