Pronunciation: (win'tu-rīz"), [key]
—v., -ized, -iz•ing.
to prepare (an automobile, house, etc.) for cold weather by (in automobiles) adding antifreeze and changing oil or (in houses) adding insulation, heating units, etc.
to winterize an automobile, house, etc. Also, esp. Brit.,win'ter•ise".
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.