A sentence is many things, and that's why it needs all seven definitions.
The seven definitions of a sentence are:
1. A sentence contains a subject and a verb and expresses a complete
In the sentence Pepo hit the ball, the idea is complete because we know exactly what happened. Also the sentence is emphatic because of the arrangement of words: subject, verb, object.
Pepo—subject; Pepo is the doer.
Hit—verb (and part of the predicate); what Pepo did.
Ball—object (and part of the predicate); what was acted upon (receiver
of the action).
2. A sentence is a sequence of words that contains a subject and a pred-
icate and conveys a complete thought.
The only real difference between this definition and the first one is the use of the word predicate rather than verb. A verb is a predicate, but a predicate can include a verb and any number of modifiers. In the sentence Pepo hit the ball, hit is the verb and part of the predicate. In the sentence Pepo hit the ball