June

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

• noun The sixth month of the year in the Gregorian calendar.

from The Century Dictionary.

• noun The sixth month of the year, consisting of thirty days, during which the sun enters the sign Cancer.

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

• noun The sixth month of the year, containing thirty days.
• noun (Zoöl.) any one of several species of large brown beetles of the genus Lachnosterna and related genera; -- so called because they begin to fly, in the northern United States, about the first of June. The larvæ of the June beetles live under ground, and feed upon the roots of grasses and other plants. Called also May bug or May beetle.
• noun (Bot.) a New England name for Kentucky blue grass. See Blue glass, and Illustration in Appendix.

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

• proper noun The sixth month of the Gregorian calendar, following May and preceding July. Abbreviation: Jun or Jun.
• proper noun A female given name for a girl born in June, used since the end of the 19th century.

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

• noun the month following May and preceding July