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-In what way or manner; by what means? How did the accident happen?
-To what extent, degree, etc.?: How damaged is the car?
-In what state or condition?: How are you?
-For what reason; why?: How can you talk such nonsense?
-To what effect; with what meaning?: How is one to interpret his action?
-What?: How do you mean? If they don't have vanilla, how about chocolate?
-(Used as an intensifier): How seldom I go there!
-By what title or name?: How does one address the president?
-At what price: How are the new cars going, cheaper than last year's models?
-By what amount or in what measure or quantity?: How do you sell these tomatoes?
-In what form or shape?: How does the demon appear in the first act of the opera? How does the medication come?
Conjunction
-The manner or way in which: He couldn't figure out how to solve the problem.
-About the manner, condition, or way in which: I don't care how you leave your desk when you go. Be careful how you act.
-In whatever manner or way; however: You can travel how you please.
-Informal that He told us how he was honest and could be trusted.
Noun
-A question concerning the way or manner in which something is done, achieved, etc.: a child's unending whys and howโ€™s.
-A way or manner of doing something: to consider all the howโ€™s and wherefores.
-A word formerly used in communications to represent the letter H.
Idioms
-And how! Informal. certainly! you bet!: Am I happy? And how!
-Here's how, Informal. (used as a toast).
-How come? Informal. how is it that? Why?: How come you never visit us anymore?
-How so? how does it happen to be so? Why?: You haven't any desire to go? How so?
How did you do that?

I could not figure out how he did that

Who, What, When, Why, Where, How?

How!?
by Ninjaskillz November 01, 2006
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The cross between at heffer and a cow. Usually somebody of a very large size.
Holy crap that is the biggest how i have ever seen!!!
by abc dog! March 03, 2007
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A Tokoroa, New Zealand synonym for the word 'so' as in that is 'so' cool.
It is pronounced with a strong emphasise on the 'o' and a carried 'w' so it should sound like "hOww' cool.
A new zealand accent also helps with this. it may be hard for foreigners
That's 'how' cool!

by Tripod-deesh NZ TOKOROA July 16, 2008
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How is Geordie/ North East of England Slang which comes from the word Hey! or Oy. Quite often paired with the slang word man which means 'God damn' or 'you'

Hey man .. making 'Hey you'

How is often used to tell someone to get off something or to tell someone to get away from somewhere.
How you get away from my car

in Geordie:-
How yee get away from me car
by Dave W May 14, 2004
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