Other forms: senti; sents
Something that's sent has been delivered or mailed, like a sent package of cookies that you dropped off earlier at the post office.
The adjective sent can be used to describe things that are on their way to a certain destination. You might find a message inside a bottle on the beach, which you read again after your sent reply is bobbing on the waves in its own bottle. Sent is also the past participle of the verb send, from the Old English root sendan, "send forth, throw, or impel."