Meaning of the word "water under the bridge" in English

What does "water under the bridge" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

water under the bridge

US /ˈwɔtər ˈʌndər ðə brɪdʒ/
UK /ˈwɔtər ˈʌndər ðə brɪdʒ/
"water under the bridge" picture

Idiom

1.

past events or issues that are no longer important or relevant, and should be forgotten

Example:
Their old argument is just water under the bridge now; they've moved on.
I know we had some disagreements, but that's all water under the bridge.
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