To press into a close or tight position; to crowd; to squeeze; to wedge in; to cram; as, rock fans jammed the theater for the concert.

To crush or bruise; as, to jam a finger in the crack of a door.

To crowd together; -- usually used with together or in; as, fifty people jammed into a conference room designed for twenty.

A mass of people or objects crowded together; also, the pressure from a crowd; a crush; as, a jam in a street; a jam of logs in a river.

A preserve of fruit boiled with sugar and water; also called jelly; as, raspberry jam; currant jam; grape jam.

Thick syrupy mixture of fruit and sugar.

Combination of fruit and sugar cooked until the mixture has an intense flavor and thick consistency. Used as a means of preservation of fruits.

n. A preserve of fruit boiled with sugar and water. It is spread on bread and butter.

A thick mixture of fruit, sugar (and sometimes pectin) that is cooked until the pieces of fruit are very soft and almost formless. It is used as a bread spread, a filling for pastries and cookies and an ingredient for various desserts.

preserve of crushed fruit

a dense crowd of people

press tightly together or cram; "The crowd packed the auditorium"

crush or bruise; "jam a toe"

crowd or pack to capacity; "the theater was jampacked"

thick spreads made from pureed or crushed fruit, mixed with sugar, and boiled until thick; sometimes pectin is added.

sweet spread made from fruit and sugar

Jelly, preserves

fresh whole fruit and sugar cooked into a spread that preserves well.

Jam (also known as jelly) is a type of sweet spread or condiment made with fruits or sometimes vegetables, sugar and sometimes thickened with pectin if the fruit's natural pectin is insufficient to produce a thickened product. Jam and its variations are often spread on bread and as a culinary sweetener, for example in yoghurt.