1) Assigned a position 2) Cubby-like 3) Fit into the schedule 4) Having a narrow opening 5) Having elongated apertures 6) Having narrow grooves 7) In position 8) Like a mailbox 9) Like a one-armed bandit 10) Like some kitchen spoons 11) Like some serving spoons 12) Like some spoons 13) Made grooves 
• (a.) Having a slot.
Slot'ted adjective Having a slot.