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vaccinate to give a vaccine to, so as to protect from a disease.
vaccine a substance used to protect people and animals from very serious diseases. Vaccines contain germs of a particular disease--these germs been killed or changed in a certain way in a laboratory to make them safe. A vaccine goes into a person's body in a shot that is given by a doctor or nurse. After a vaccine is put into a person's body, that person will not get that disease or will get only a mild case.
vacuum a space empty of all matter. [4 definitions]
vacuum cleaner an electrical appliance that cleans floors, carpets, rugs, and upholstery by means of suction.
vagina in most female mammals, the passage leading from the uterus to the opening through which a baby is conceived and born; birth canal.
vain not leading to a desirable or lasting effect. [2 definitions]
valentine a greeting card or gift sent on Valentine's Day. [2 definitions]
Valentine's Day see Saint Valentine's Day.
valid based on truth, fact, or logic. [2 definitions]
valley a long area of low land between mountains or hills. A stream or river often runs through a valley.
valuable having a great value in money; expensive. [3 definitions]
value the worth, importance, or usefulness of something. [5 definitions]
valve a device that controls the flow of a liquid or gas through a pipe or tube. [3 definitions]
vampire a creature in folk tales that is said to have died but come back to life. Vampires suck blood from people in order to stay among the living. [2 definitions]
van2 a closed truck or car used to move people or goods.
vandal a person who destroys or damages property on purpose.
vandalism destruction or damage of property that is done on purpose.
vane a device set up to turn in the wind. Vanes show the direction of the wind. [2 definitions]
vanilla a tropical flower, a type of orchid, that bears a fruit used for flavoring. [4 definitions]
vanish to disappear suddenly from sight. [2 definitions]
vanity too much pride in oneself or in how one looks.