snowball

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

• noun A mass of soft, wet snow packed into a ball that can be thrown, as in play.
• noun Any of several plants having rounded clusters of white flowers, especially certain cultivated viburnums.
• noun Chiefly Southern US A snow cone.
• intransitive verb To grow rapidly in significance, importance, or size.
• intransitive verb To throw snowballs.
• intransitive verb To cause to grow or increase rapidly.
• intransitive verb To throw snowballs at.

from The Century Dictionary.

• noun A delicate pudding steamed in a mold, then rolled in powdered sugar, and served with wine sauce.
• noun A ball of snow; a round mass of snow pressed or rolled together.
• noun The cultivated form of the shrub Viburnum Opulus; the guelder-rose.
• noun In cookery:
• noun A pudding made by putting rice which has been swelled in milk round a pared and cored apple, tying up in a cloth, and boiling well.
• noun White of egg beaten stiff and put in spoonfuls to float on the top of custard.
• noun Rice boiled, pressed into shape in a cup, and variously served.
• To pelt with snowballs.
• To throw snowballs.

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

• noun A round mass of snow pressed or roller together, or anything resembling such a mass.
• noun (Bot.) The Guelder-rose.
• noun (Bot.) a shrub of the genus Viburnum, having large clusters of white flowers.
• noun (Bot.) the Guelder-rose.
• noun [Colloq.] no chance; an infinitesimal chance.
• transitive verb To pelt with snowballs; to throw snowballs at.
• intransitive verb To throw snowballs.
• intransitive verb To increase in magnitude at an accelerating rate, achieving large proportions; -- by analogy with a snowball rolling down a steep hill, causing a large snow slide.

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

• noun A ball of snow, usually one made in the hand and thrown for amusement in a snowball fight; also a larger ball of snow made by rolling a snowball around in snow that sticks to it and increases its diameter.
• noun A cocktail made from lemonade and advocaat.
• noun figuratively Something that snowballs (grows rapidly out of control).
• noun A sex act involving passing ejaculated semen from one person's mouth to another's.
• verb intransitive To rapidly grow out of proportion or control.
• verb intransitive To play at throwing snowballs.
• verb intransitive (sexual slang) To receive a man's ejaculate in one's mouth, and then to pass it back and forth between one's mouth and his.

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

• noun snow pressed into a ball for throwing (playfully)
• verb increase or accumulate at a rapidly accelerating rate
• noun plant having heads of fragrant white trumpet-shaped flowers; grows in sandy arid regions
• noun ball of ice cream covered with coconut and usually chocolate sauce
• noun ball of crushed ice with fruit syrup
• verb throw snowballs at