verb
crams; crammed; cramming
[+ obj] :to fill (something) so that there is no room for anything else :to fill (something) completely
[+ obj] to push or force (someone or something) into a space that is tight or crowded - usually + into or in
[no obj] :to push or force yourself into a space that is tight or crowded - usually + into
[no obj] :to prepare for a test, exam, etc., by learning a lot of information quickly - usually + for
[+ obj] chiefly Brit :to prepare (someone) for a test, exam, etc., by teaching a lot of information quickly - usually + for
cram in
[phrasal verb]
cram in (someone or something) or cram (someone or something) in :to make a special effort to meet with (someone) or to do (something) although you are very busy
noun
plural crams
[count] US :a quick period of study in order to learn a lot of information quickly for a test, exam, etc. - usually used before another noun
A cram school is a school designed to help students prepare for exams and get into better schools.