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:
rise to the bait
Meaning:
to be lured by some kind of bait or enticement
Example:
My friend rose to the bait when I offered to help him if he would help me.
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.