- beside; by the side of: The dog ran alongside me all the way.
- Informal. alongside of, compared with: Alongside of his brother, he is no student at all.
- (often foll by of) along the side of; along besidealongside the quay
- along the side of some specified thingcome alongside
Beside, next to, as in Tom’s canoe lay alongside of mine. [Late 1700s]
Together with, as in Her children played alongside of mine all summer long. [Late 1700s]
Compared to, as in My car doesn’t look like much alongside of Dad’s. [Colloquial; late 1800s]