D defs.my
Entry 2 senses Webster, 1913

Gratuity

/grət-o͞o'-ĭt-ē/ · Gra·tu·i·ty · IPA /ɡɹəˈtuːətɪ/
01 n. Something given freely or without recompense; a free gift; a present.
pl. Gratuities ((#))
  1. 1.
    Something given freely or without recompense; a free gift; a present.
  2. 2.
    Something voluntarily given in return for a favor or service, as a recompense or acknowledgment.