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English definition of “so”

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so

adverb [not gradable]  /soʊ/ us  

so adverb [not gradable] (TO SUCH A DEGREE)

to such a great degree; very: He’s so stupid he’d believe anything you tell him. Our families live so far away.

so adverb [not gradable] (SIMILARLY)

(used usually before the verbs have, be, do, and other auxiliary verbs) in the same way; similarly: He was interested, and so were a lot of other people.

so adverb [not gradable] (TRUE)

true, or truly: He thinks I’m out to get him, but that simply isn’t so.

so adverb [not gradable] (IN THIS WAY)

more or less like this or in this way: Grandpa could be generous when he so desired. So is also used to suggest the approximate size of someone or something: The box is about so big.

so

adjective, adverb [not gradable]  /soʊ/ us  

so adjective, adverb [not gradable] (IT IS THE SITUATION)

(used instead of repeating something that has just been mentioned) it is the situation: "I hope our paths cross again." "I hope so too."

so

conjunction  /soʊ/ us  

so conjunction (THEREFORE)

and for that reason; therefore: My knee started hurting, so I stopped running.

so conjunction (IN ORDER THAT)

in order that, or with the result that: They moved so they could be closer to her family.
(Definition of so adverb, adjective, adverb, conjunction from the Cambridge Academic Content Dictionary © Cambridge University Press)
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