monthly

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

• adjective Occurring, appearing, or coming due every month.
• adjective Continuing or lasting for a month.
• adverb Once a month; every month.
• noun A periodical publication appearing once each month.
• noun Informal The menses.

from The Century Dictionary.

• Once a month; in every month: as, the moon changes monthly.
• As if under the influence of the moon; in the manner of a lunatic.
• Continued for a month, or performed in a month: as, the monthly revolution of the moon.
• Done or happening once a month or every month: as, a monthly meeting; a monthly visit.
• Lasting a month.
• noun A magazine or other literary periodical published once a month.
• noun plural Menses.

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

• adjective Continued a month, or a performed in a month.
• adjective Done, happening, payable, published, etc., once a month, or every month
• adjective a nurse who serves for a month or some short time, esp. one which attends women after childbirth.
• noun A publication which appears regularly once a month.
• adverb Once a month; in every month.
• adverb obsolete As if under the influence of the moon; in the manner of a lunatic.

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

• adjective Occurring every month.
• adverb Occurring every month.
• noun A magazine that is published once a month
• noun euphemistic the menstrual period

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

• noun a periodical that is published every month (or 12 issues per year)
• adjective of or occurring or payable every month
• adverb occurring once a month