| a sentence containing two or more coordinate independent clauses, usually joined by one or more conjunctions, but no dependent clause, as The lightning flashed (independent clause) and (conjunction) the rain fell (independent clause). |

| compound sentence n. A sentence of two or more coordinate independent clauses, often joined by a conjunction or conjunctions, as The problem was difficult, but I finally found the answer. |
A sentence that contains at least two independent clauses, often joined by conjunctions: “Dr. Watson explained his theory, and Sherlock Holmes listened quietly.” (Compare complex sentence, compound-complex sentence, and simple sentence.)