Real Dictionary

cram
verb: If people cram into a place or vehicle or cram a place or vehicle, so many of them enter it at one time that it is completely full.
verb: If you are cramming for an examination, you are learning as much as possible in a short time just before you take the examination.
verb: If you cram a hat on, you put it on, especially in a hurry.
verb: If you cram things or people into a container or place, you put them into it, although there is hardly enough room for them.

Cram in American English
Ralph Adams1863-1942; U.S. architect & writer
to fill (a space) beyond normal capacity by pressing or squeezing; pack full or too full
intransitive verb: to eat greedily or to excess
noun: the act of cramming for an examination
transitive verb: to fill (something) by force with more than it can easily hold

cram in British English
noun: Steve. born 1960, English middle-distance runner: European 1500 m champion (1981, 1986); world 1500 m champion (1983)
noun: the act or condition of cramming
verb: to force (people, material, etc) into (a room, container, etc) with more than it can hold; stuff