| Definition -
A group of words that contains a subject and a verb and which expresses a complete thought. In essence, an independent clause is a simple sentence.
Note: This is in contrast to the subordinate clause, which is a group of words that contains a subject and a verb, but which does not express a complete thought, thus is not a complete sentence.
(1) Barry ate macaroni for dinner.
(this is an independent clause because the thought is complete)
(2) While Barry ate macaroni for dinner, ….
(this is a subordinate clause, because the thought is incomplete)