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1. Next to. I parked my car alongside of yours. My dog sleeps alongside of me all night.
2. Together with. We've been neighbors for so long that our kids grew up alongside of each other.
3. In comparison to. When you consider these two options alongside of each other, one is clearly superior.
alongside (of) someone or something
as compared with a person or a thing. (The things being compared need not be beside one another. Of is normally used before pronouns.) Our car looks quite small alongside of theirs. My power of concentration is quite limited alongside of yours.
draw (up) alongside someone or somethingand draw (up) alongside
to move up even with someone or something in motion. The police officer drew up alongside us and ordered us to pull over. A car drew up alongside us.
lay alongside something
[for a ship] to rest afloat next to something. The ship lay alongside a lovely island while a shore party searched for fresh water. Our ship lay alongside the narrow wooden pier.
lay something alongside (of something)
to place something next to something else, lengthwise. (Of is usually retained before pronouns.) Please lay the spoon alongside the knife. Find the knife and lay the spoon alongside.
lie alongside (of someone or an animal)
to lie next to someone or an animal. (Of is usually retained before pronouns.) Jimmy came in to lie alongside of his father in bed. The puppy lay alongside its mother.
line up alongside someone or something
to form or get into a line beside someone or something. Can you line up alongside the other people? Line up alongside the wall and get ready to be photographed.
pull (up) alongside (of someone or something)
to move to a point beside someone or something. (Of is usually retained before pronouns.) The car pulled up alongside the truck and honked and the people inside waved and waved. Please pull alongside the curb.
1. Beside, next to, as in Tom's canoe lay alongside of mine. [Late 1700s]
2. Together with, as in Her children played alongside of mine all summer long. [Late 1700s]
3. Compared to, as in My car doesn't look like much alongside of Dad's. [Colloquial; late 1800s]