Definition of "hi" in English

interjection

1. A friendly, informal, casual greeting said upon someone's arrival.

   • Hi, how are you?
   • I just dropped by to say “hi”.
   • Anna: Pete, hi! Hi, we are here! — Pete: Hi, Anna! Hi, Marsha! — Anna: Hi! — Pete: How are you two? — Marsha: I am great!

2. An exclamation to call attention.

3. (dated) Expressing wonder or derision.

noun

1. The word "hi" used as a greeting.

   • I didn't even get a hi.

adjective

1. Informal spelling of high, often in hyphenated terms.

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