\Hil"a*ry term`\
Formerly, one of the four terms of the courts of common law
in England, beginning on the eleventh of January and ending
on the thirty-first of the same month, in each year; -- so
called from the festival of St. Hilary, January 13th.

Note: The Hilary term is superseded by the Hilary sittings,
      which commence on the eleventh of January and end on
      the Wednesday before Easter. --Mozley & W.