happy

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

• adjective Enjoying, showing, or marked by pleasure, satisfaction, or joy. synonym: glad.
• adjective Cheerful; willing.
• adjective Characterized by good luck. synonym: fortunate.
• adjective Being especially well-adapted; felicitous.
• adjective Characterized by a spontaneous or obsessive inclination to use something. Often used in combination.
• adjective Enthusiastic about or involved with to a disproportionate degree. Often used in combination.

from The Century Dictionary.

• Manifesting or marked by good hap or fortune; lucky; fortuitously fortunate, favorable, or successful: as, a happy contingency or omen; a happy thought or discovery.
• Conscious that one's general condition of feeling is a highly satisfactory one; conscious that one feels, in general, decidedly more pleasure than pain; having a general feeling of pleasure; satisfied; pleased.
• Being in a favorable condition or in advantageous circumstances; fortunate; secure of good; blessed.
• Affording pleasure or enjoyment; bringing or attended with good fortune, luck, or pleasure; agreeable: as, happy thoughts; a happy condition; happier times.
• Indicative or expressive of happiness; joyful: as, the happy shouts of children; happy smiles or tears.
• Apt; fitting the purpose, occasion, or circumstances; opportune; felicitous: as, a happy expedient; a happy retort.
• Dexterous; ready; able.
• Synonyms Happy, Felicitous, Fortunate, Lucky. Felicitous is now rarely used except in the sense of apt and pleasing, a sense in which happy also is used: as, a felicitous or happy combination, answer, speech. Fortunate and lucky, by their derivations, are a higher and a lower term for the prosperous turns of chance or the lot in life. Happy, though essentially the same by derivation, has a broader application; it is never altogether separated from the idea of enjoyment. See happiness.
• To make happy.

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

• adjective Favored by hap, luck, or fortune; lucky; fortunate; successful; prosperous; satisfying desire
• adjective Experiencing the effect of favorable fortune; having the feeling arising from the consciousness of well-being or of enjoyment; enjoying good of any kind, as peace, tranquillity, comfort; contented; joyous.
• adjective Dexterous; ready; apt; felicitous.
• adjective a collection of animals of different and hostile propensities living peaceably together in one cage. Used ironically of conventional alliances of persons who are in fact mutually repugnant.
• adjective trusting to hap or luck; improvident; easy-going.

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

• adjective Experiencing the effect of favourable fortune; having the feeling arising from the consciousness of well-being or of enjoyment; enjoying good of any kind, as peace, tranquillity, comfort; contented; joyous.
• adjective Favored by luck or fortune; lucky.
• adjective Dexterous; ready; apt; felicitous.
• adjective Content, satisfied (with or to do something); having no objection (to something).

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

• adjective enjoying or showing or marked by joy or pleasure
• adjective eagerly disposed to act or to be of service
• adjective marked by good fortune
• adjective well expressed and to the point