Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adv. Without charge.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adv. free, without charge
  • adj. free, without charge

from the GNU version of the Collaborative International Dictionary of English

  • adv. For nothing; without fee or recompense; freely; gratuitously.

from The Century Dictionary and Cyclopedia

  • For nothing; freely; without pay: as, to perform service gratis.
  • Gratuitous.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adv. without payment
  • adj. costing nothing

Etymologies

Middle English, from Latin grātīs, alteration of grātiīs, out of kindness, free, ablative pl. of grātia, kindness; see gwerə-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin gratis. (Wiktionary)

Examples