Depending on the size and method, defrosting a refrigerator or freezer can take anywhere from 10 minutes to a day. The most common method is to unplug the refrigerator or freezer, prop the door open and allow the ice to melt on its own. However, this method may take up to a day to defrost the appliance completely.
Circle is the locus of points equidistant from a given point, the center of the circle. The common distance from the center of the circle to its points is called radius. Thus a circle is completely defined by its center (O) and radius (R): C(O, R) = O(R) = {x: dist(O, x) = R}.
Definition of circle for English Language Learners. : 1  a perfectly round shape : a line that is curved so that its ends meet and every point on the line is the same distance from the center. : 2  a path that goes around a central point. : 3  an arrangement of people or things that forms a circle.