D defs.my
Entry 2 senses Webster, 1913

Numerator

/no͞oʹ-mər-ā'-tər/ · Nu·mer·a·tor · IPA /ˈnuː.məɹˌeɪ̯.təɹ/
01 n. One who numbers.
  1. 1.
    One who numbers.
  2. 2.
    The term in a fraction which indicates the number of fractional units that are taken.(Math.)