slot
Definitions
A narrow opening, slit, or groove into which something may be inserted.
A position or time assigned for a specific purpose, such as in a schedule or program.
A place or role in a sequence, series, or organization.
Examples
Please insert your coin into the slot to start the machine.
I managed to slot the final piece of the puzzle into place.
The manager found a free slot in the schedule for our meeting next Tuesday.