wild

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

• adjective Occurring, growing, or living in a natural state; not domesticated, cultivated, or tamed.
• adjective Not inhabited or farmed.
• adjective Uncivilized or barbarous.
• adjective Lacking supervision or restraint.
• adjective Disorderly; unruly.
• adjective Characterized by a lack of moral restraint; dissolute or licentious.
• adjective Lacking regular order or arrangement; disarranged.
• adjective Full of, marked by, or suggestive of strong, uncontrolled emotion.
• adjective Extravagant; fantastic.
• adjective Furiously disturbed or turbulent; stormy.
• adjective Risky; imprudent.
• adjective Impatiently eager.
• adjective Informal Highly enthusiastic.
• adjective Based on little or no evidence or probability; unfounded.
• adjective Deviating greatly from an intended course; erratic.
• adjective Games Having an equivalence or value determined by the cardholder's choice.
• adverb In a wild manner.
• noun A natural or undomesticated state.
• noun A region that is mostly uninhabited or uncultivated.
• intransitive verb To go about in a group threatening, robbing, or attacking others.

from The Century Dictionary.

• Being in a state of ebullition. Thus steel, solidifying in a mold, which is evolving gases, is said to be wild.
• noun An obsolete variant of Weald, perhaps due to confusion with wild.
• Self-willed; wayward; wanton; impatient of restraint or control; stirring; lively; boisterous; full of life and spirits; hence, frolicsome; giddy; light-hearted.
• Boisterous: tempestuous; stormy; violent; turbulent; furious; uncontrolled: used in both a physical and a moral sense.
• Bold; brave; daring; wight.
• Loose and disorderly in conduct; given to going beyond bounds in pleasurable indulgence; ungoverned; more or less dissolute, wayward, or unrestrained in conduct; prodigal.
• Reckless; rash; ill-considered; extravagant; out of accord with reason or prudence; haphazard: as, a wild venture; wild trading.
• Extravagant; fantastic; irregular; disordered; weird; queer.
• Enthusiastic; eager; keen; especially, very eager with delight, excitement, or the like.
• Excited; roused; distracted; crazy; betokening or indicating excitement or strong emotion.
• Wide of the mark or direct line, standard, or bounds.
• Living in a state of nature; inhabiting the forest or open field; roving: wandering; not tame; not domesticated; feral or ferine: as, a wild boar; a wild ox; a wild cat; a wild bee.
• Noting beasts of the chase, game-birds, and the like, which are noticeably shy, wary, or hard to take under certain circumstances: opposed to tame, 1 : as, the birds are wild this morning.
• Savage; uncivilized; ungoverned; unrefined; ferocious; sanguinary: noting persons or practices.
• Growing or produced without culture; produced by unassisted nature, or by wild animals; native; not cultivated: as, wild parsnip; wild cherry; wild honey.
• Desert; not inhabited; uncultivated.
• To escape from domestication and revert to the feral state.
• To escape from cultivation and grow in a wild state.
• See Ipomæa.
• A locomotive which by some accident or derangement has escaped from the control of its driver.
• A seesaw.
• The West Indian euphorbiaeeous tree Drypetes glauca.
• Gærtnera vaginata, of Réunion, without ground reported as a fit substitute for coffee: often misnamed mussænda.
• In the West Indies, a plant of the genus Tillandsia, especially T. utriculata.
• Synonyms and Rude, impetuous, irregular, unrestrained, harebrained, frantic, frenzied, crazed, fanciful, visionary, strange, grotesque.
• noun A desert; an uninhabited and uncultivated tract or region; a waste.
• noun plural Wild animals; game.

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

• noun An uninhabited and uncultivated tract or region; a forest or desert; a wilderness; a waste.