fraction

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

• noun Mathematics An expression that indicates the quotient of two quantities, such as ¹/₃ .
• noun A disconnected piece; a fragment.
• noun A small part; a bit.
• noun A chemical component separated by fractionation.

from The Century Dictionary.

• noun In mathematics: In geometry, any multiple of any submultiple of a magnitude.
• noun In chem., one of the parts into which a substance is separated in the process of fractional distillation. See fractionation.
• Same as fractionate.
• noun The act of breaking, or the state of being broken, especially by violence; a breaking or fracture.
• noun Specifically (ecclesiastical), the liturgical act of breaking or dividing the eucharistic bread, or host.
• noun A fragment; a separated portion; a disconnected part.
• noun In mathematics: In arithmetic, a part, or a number of aliquot parts, of unity.
• noun In algebra, a ration of algebraic quantities analogous to the arithmetical vulgar fraction, and similarly expressed.

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

• transitive verb (Chem.) To separate by means of, or to subject to, fractional distillation or crystallization; to fractionate; -- frequently used with out.
• noun obsolete The act of breaking, or state of being broken, especially by violence.
• noun A portion; a fragment.
• noun (Arith. or Alg.) One or more aliquot parts of a unit or whole number; an expression for a definite portion of a unit or magnitude.
• noun a fraction in which the number of equal parts into which the integer is supposed to be divided is indicated by figures or letters, called the denominator, written below a line, over which is the numerator, indicating the number of these parts included in the fraction; as 1/2, one half, 2/5, two fifths.
• noun a fraction having a fraction or mixed number in the numerator or denominator, or in both.
• noun a fraction of a fraction; two or more fractions connected by of.
• noun See under Continued, Decimal, Partial, etc.
• noun a fraction in which the numerator is greater than the denominator.
• noun a fraction in which the numerator is less than the denominator.

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

• noun A part of a whole, especially a comparatively small part.
• noun A ratio of two numbers, the numerator and the denominator, usually written one above the other and separated by a horizontal bar.
• noun chemistry A component of a mixture, separated by fractionation.
• noun In a eucharistic service, the breaking of the host.
• noun A small amount.
• verb To divide or break into fractions.

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

• noun a small part or item forming a piece of a whole
• noun the quotient of two rational numbers
• verb perform a division
• noun a component of a mixture that has been separated by a fractional process