noun

• Exercises assigned by a teacher to a student which review concepts studied in class.
• (by extension) Something which one is encouraged to learn or study on one's own.
• (literally, now rare) Any work that is done at home; housework.
• (slang, euphemistic) Sexual intercourse.
• (BDSM) Tasks assigned by a dominant for a submissive to perform when they are physically away from their dominant or otherwise free.