D defs.my
Entry 2 senses · 2 variants Webster, 1913

'Em

/əm/ · IPA /əm/
01 An obsolete or colloquial contraction of the old form hem, them.
  1. 1.
    An obsolete or colloquial contraction of the old form hem, them.
02 n. The portion of a line formerly occupied by the letter m, then a square type, used as a unit by which to measure the amount of printed matte…
  1. 1.
    The portion of a line formerly occupied by the letter m, then a square type, used as a unit by which to measure the amount of printed matter on a page; the square of the body of a type.(Print.)