from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The ordinal number matching the number eight in a series.
  • noun One of eight equal parts.

from The Century Dictionary.

  • Next after the seventh: an ordinal numeral.
  • noun The quotient of unity divided by eight; one of eight equal parts of anything.
  • noun In music: The interval between any tone and a tone on the eighth diatonic degree above or below it; an octave.
  • noun A tone distant by an eighth or octave from a given tone; an octave or replicate. The eighth tone of a scale is really the prime or key-note of a replicate scale.
  • noun An eighth-note.
  • noun In early English law, an eighth part of the rents for the year, or of movables, or both, granted or levied by way of tax.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The quotient of a unit divided by eight; one of eight equal parts; an eighth part.
  • noun (Mus.) The interval of an octave.
  • adjective Next in order after the seventh.
  • adjective Consisting of one of eight equal divisions of a thing.
  • adjective (Mus.) the eighth part of a whole note, or semibreve; a quaver.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective The ordinal form of the number eight.
  • noun The person or thing in the eighth position.
  • noun One of eight equal parts of a whole.
  • noun slang An "eighth" of an ounce equalling approximately 3.5 grams in marijuana or other drugs.

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

  • noun position eight in a countable series of things
  • adjective coming next after the seventh and just before the ninth in position
  • noun one part in eight equal parts


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

[Middle English eighthe, from Old English eahtotha, from eahta, eight; see oktō(u) in Indo-European roots.]



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