Cramming is a study technique where a student works intensively to absorb large volumes of information in a short amount of time, often in preparation for an upcoming exam). It is generally considered an undesirable study technique, but it is widely used by high school and college-aged students as a means of memorizing large amounts of information in a short amount of time). Cramming is often used when students have not managed their time properly or when they need to understand information shortly before being tested).

In addition to its use in education, "cram" can also refer to the act of stuffing or crowding something into a small space. For example, one might cram clothes into a bag or cram six children into the back of a car. "Cram" can also mean to fill something full, such as barns crammed with hay.

Finally, "cram" can also be used as a verb to describe the act of studying a subject intensively, especially for an imminent examination. For example, a student might cram for a history exam or revise for a test.

Overall, "cram" can refer to the act of studying intensively, the act of stuffing or crowding something into a small space, or the act of filling something full.