interjection
hi
heye
interjection
1
A friendly, casual greeting.
"Hi, how are you doing?"
"She waved and said hi as she walked past."
How to Use Hi
Learner’s notesIn plain EnglishThe everyday, casual way to say hello.
When to use it
Informal — appropriate for most everyday situations but not for very formal introductions.
Word Forms
his plural
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_____, how are you doing?
Etymology
Recorded in American English from the mid-1800s, likely a variant of the older greeting/attention-call "hey."