The Collaborative International Dictionary of English v.0.48:

Menial \Men"ial\, n.
   1. A domestic servant or retainer, esp. one of humble rank;
      one employed in low or servile offices.
      [1913 Webster]

   2. A person of a servile character or disposition.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Menial \Men"ial\, a. [OE. meneal, fr. meine, maine, household,
   OF. maisni['e]e, maisnie, LL. mansionaticum. See Mansion,
   and cf. Meine, n., Meiny.]
   [1913 Webster]
   1. Belonging to a retinue or train of servants; performing
      servile office; serving.
      [1913 Webster]

            Two menial dogs before their master pressed.
                                                  --Dryden.
      [1913 Webster]

   2. Pertaining to servants, esp. domestic servants; servile;
      low; mean; as, menial tasks. " Menial offices." --Swift.
      [1913 Webster]

WordNet (r) 3.0 (2006):

menial
    adj 1: used of unskilled work (especially domestic work) [syn:
           humble, menial, lowly]
    n 1: a domestic servant