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 of parallel for English Language Learners. : 1  a way in which things are similar : a shared quality or characteristic. : 2  something that is equal or similar. : 3  any one of the imaginary circles on the surface of the Earth that are parallel to the equator and that are shown as lines on maps.