It is a common greeting used when parting ways with someone.
It literally translates to "go (haere) day (ra)".
Here are some other ways to say "farewell" in Māori:
* Tena koe (goodbye, literally "be well")
* Arohanui (love and affection, can be used as a farewell)
* Ka kite anō (see you again)
* Mōrena (good morning, can be used as a farewell)
* Ata mārie (good night, can be used as a farewell)