I applied for the slot in management training. 5. Journalism. the interior opening in a copy desk, occupied by the chief copy editor. the job or position of chief copy. slot sb/sth in meaning, definition, what is slot sb/sth in: to find time to see someone or Doctor Meredith is busy this morning, but she might be able to slot you in. slot. slang used in the British armed forces meaning to kill or shoot. Soldier 1: Christ that was bad, that "I hate you so much one day I'm going to slot you.".