+1 vote
When did Hi become a greeting?

2 Answers

0 votes
Hi : greeting, 1862, American English (first recorded reference is to speech of a Kansas Indian), originally to attract attention (15c.), probably a variant of Middle English hy, hey (late 15c.) also an exclamation to call attention. Extended form hiya attested from 1940.
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Useful English greetings and responses -- Free English Lesson