Simple Definition of hi

from our Learner's Dictionary

hi

interjection

ˈhaɪ

—used as an informal way of saying "hello"

Hi, how are you?

Aren't you going to say hi to [=greet] him?

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“Hi.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/hi. Accessed 15 Jul. 2026.

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