Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • A trademark used for the drug sildenafil citrate.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • proper n. Trademark name of the drug, sildenafil citrate, used to treat erectile dysfunction.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. virility drug (trade name Viagra) used to treat erectile dysfunction in men

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

Disputed. Possibly from Sanskrit व्याघ्र (vyāghra, "tiger"). Probably suggested by words such as virile and virility.

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