Definitions

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

  • n. A unit of electrical resistance equal to that of a conductor in which a current of one ampere is produced by a potential of one volt across its terminals. See Table at measurement.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. In the International System of Units, the derived unit of electrical resistance; the electrical resistance of a device across which a potential difference of one volt causes a current of one ampere. Symbol: Ω

from the GNU version of the Collaborative International Dictionary of English

  • n. The standard unit in the measure of electrical resistance, being the resistance of a circuit in which a potential difference of one volt produces a current of one ampére. As defined by the International Electrical Congress in 1893, and by United States Statute, it is a resistance substantially equal to 109 units of resistance of the C. G. S. system of electro-magnetic units, and is represented by the resistance offered to an unvarying electric current by a column of mercury at the temperature of melting ice 14.4521 grams in mass, of a constant cross-sectional area, and of the length of 106.3 centimeters. As thus defined it is called the international ohm.

from The Century Dictionary and Cyclopedia

  • n. In electricity, the unit of resistance (see resistance).
  • n. An abbreviation of On His (or Her) Majesty's Service.

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

  • n. a unit of electrical resistance equal to the resistance between two points on a conductor when a potential difference of one volt between them produces a current of one ampere
  • n. German physicist who formulated Ohm's law (1787-1854)

Etymologies

After Georg Simon Ohm.
(American Heritage® Dictionary of the English Language, Fourth Edition)
After Bavarian physicist Georg Ohm. (Wiktionary)

Examples

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