An idiom: a conventional phrase in a language whose meaning is not always deducible from the literal meanings of its parts; important in language learning and translation.
"Kick the bucket"は英語のイディオムで、直訳しても意味が通じない。
"Kick the bucket" is an English idiom; a literal translation does not convey its meaning.
英会話ではイディオムを覚えておくと自然な表現が増える。
Learning idioms in English conversation increases your range of natural expressions.
辞書でイディオムの用例を確認してから使うと安全だ。
It's safe to check dictionary examples of an idiom before using it.
日本語にも多くのイディオム（慣用句）がある。
Japanese also has many idioms (kanyōku).