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hi

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hi

1[hahy]
–interjection
(used as an exclamation of greeting); hello!

Origin:
1425–75; late ME hy, perh. var. of hei hey

hi

2[hahy]
–adjective
an informal, simplified spelling of high: hi fidelity.

HI

Hawaii (approved esp. for use with zip code).

H.I.

1. Hawaiian Islands.
2. Meteorology. heat index.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Ha·wai·i or Ha·wai'i   (hə-wä'ē, -wī'ē, -vä'ē)   
Abbr. HI
A state of the United States in the central Pacific Ocean comprising the Hawaiian Islands. The islands became a U.S. territory in 1900, which was admitted as the 50th state in 1959. Honolulu, on Oahu, is the capital and the largest city. Population: 1,280,000.
hi   (hī)   
interj.   Informal
Used to express greeting. See Regional Note at hey.
HI  
abbr.  
  1. Hawaii

  2. high intensity

  3. humidity index

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
Word Origin & History

hi 
greeting, 1862, Amer.Eng. (first recorded reference is to speech of a Kansas Indian), originally to attract attention, probably a variant of M.E. hy, hey (c.1475) also an exclamation to call attention. Extended form hiya attested from 1940.
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: HI
Function: abbreviation
hemagglutination inhibition
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Abbreviations & Acronyms
hi
  1. high

  2. Hindi

HI
  1. Hawaii

  2. high intensity

  3. humidity index

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Cite This Source
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