Definition of "fraction" in English

noun

1. A part of a whole, especially a comparatively small part.

2. (arithmetic) A ratio of two numbers (numerator and denominator), usually written one above the other and separated by a horizontal bar called the vinculum or, alternatively, in sequence on the same line and separated by a solidus (diagonal bar).

   • Gasoline prices show the mill as a fraction, for example $3.59+⁹⁄₁₀.

3. (chemistry) A component of a mixture, separated by fractionation.

4. (Christianity) In a eucharistic service, the breaking of the host.

5. A small amount.

6. (archaic) The act of breaking, or state of being broken, especially by violence.

verb

1. (transitive) To divide or break into fractions.

2. (transitive) To fractionate.