Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adverb Undoubtedly; definitely.
  • adverb By all means; of course.
  • adverb Surely.

from The Century Dictionary.

  • With certainty; without doubt or question; in truth and fact; without fail; inevitably; assuredly; undoubtedly; unquestionably; of a certainty.

from the GNU version of the Collaborative International Dictionary of English.

  • adverb Without doubt or question; unquestionably.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adverb In a way which is certain; with certainty.
  • adverb Without doubt, surely; of course.
  • adverb An emphatic affirmative answer.

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

  • adverb definitely or positively (`sure' is sometimes used informally for `surely')

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

certain +‎ -ly

Examples

Comments

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