Idioms and idiomatic expressions in EnglishAn idiom is a group of words in current usage having a meaning that is
not deducible from those of the individual words.
For example,- "to rain cats and dogs" - which means "to rain very heavily"
-"over the moon" - which means "extremely happy"
*In both cases, you would have a hard time understanding the real meaning
if you did not already know these idioms!*
day to day