An expression in the usage of a language that is peculiar to itself either in having a meaning that cannot be derived from the conjoined meanings of its elements or in its grammatically atypical use of words.
Idiom:
put across (something) or put (something) across
Meaning:
to make oneself understood, to communicate something
Example:
The speaker spends much effort trying to clearly put across what he wants to say.
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.