slot

noun1 of 2

a long narrow opening, into which you put or fit something

• “You only have to slide it into the slot.”Tatoeba
• “Envelopes are inserted through the slot.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

verb2 of 2

To bar, bolt or lock a door or window.