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

  • adj. Occurring every two months; bimonthly.
  • adj. Lasting two months.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Occurring once every two months

from the GNU version of the Collaborative International Dictionary of English

  • adj. Continuing two months.

from The Century Dictionary and Cyclopedia

  • Happening every two months; continuing two months.

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

  • adj. occurring every two months
  • adj. two months long; lasting two months


From Latin bimēstris : bi-, two; see bi-1 + mēnsis, month; see mē-2 in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)


  • (June, 1300), -- an office which the Florentines had made bimestrial in its tenure, in order apparently to secure at least six constitutional chances of revolution in the year.

    Among My Books Second Series

  • Help-online (i.e. videoconference) requests and payments are made at the beginning of the month on monthly (bimestrial, 3 -, 4 -, 6 -, 12-months) base. - New Projects


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