GNU Collaborative International Dictionary of English

Found one definition

1.       
   How , adv. [OE. how, hou, hu, hwu, AS. h, from the same root as hwā, hwæt, who, what, pron. interrog.; akin to OS. hwōw, D. hoe, cf. G. wie how, Goth. hwē wherewith, hwaiwa how. √182. See Who, and cf. Why.]
   In what manner or way; by what means or process.
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   How can a man be born when he is old?
   John iii. 4.
   
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   To what degree or extent, number or amount; in what proportion; by what measure or quality.
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   O, how love I thy law! it is my meditation all the day.
   Ps. cxix. 97.
   
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   By how much they would diminish the present extent of the sea, so much they would impair the fertility, and fountains, and rivers of the earth.
   Bentley.
   
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   For what reason; from what cause.
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   How now, my love! why is your cheek so pale?
   Shak.
   
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   In what state, condition, or plight.
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   How, and with what reproach, shall I return?
   Dryden.
   
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   By what name, designation, or title.
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   How art thou called?
   Shak.
   
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   At what price; how dear. [Obs.]
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   How a score of ewes now?
   Shak.
   
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   ☞ How is used in each sense, interrogatively, interjectionally, and relatively; it is also often employed to emphasize an interrogation or exclamation. “How are the mighty fallen!” 2 Sam. i. 27. Sometimes, also, it is used as a noun; -- as, the how, the when, the wherefore. Shelley.
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   Let me beg you -- don't say “How?” for “What?”
   Holmes.
   
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