WARNING: Antidepressant medications are used to treat a variety of conditions, including depression and other mental/mood disorders. These medications can help prevent suicidal thoughts /attempts and provide other important benefits.
Definition of parallel for Students. 1  1 : a line or surface that lies at or moves in the same direction as another but is always the same distance from it. 2  2 : one of the imaginary circles on the earth's surface running in the same direction as the equator and marking latitude.
Definition. In grammar, parallelism is the similarity of structure in a pair or series of related words, phrases, or clauses. Also called parallel structure or isocolon.By convention, items in a series appear in parallel grammatical form: a noun is listed with other nouns, an-ing form with other-ing forms, and so on.efinition. In grammar, parallelism is the similarity of structure in a pair or series of related words, phrases, or clauses. Also called parallel structure or isocolon.