Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Once every half-hour.
  • adv. Once every half-hour.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Done or happening at intervals of half an hour.

from The Century Dictionary and Cyclopedia

  • Occurring at intervals of half an hour, or lasting half an hour.

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

  • adj. occurring ever half hour
  • adv. every thirty minutes, every half hour

Etymologies

half-hour +‎ -ly (Wiktionary)

Examples

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