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English definition of “so”

so

adverb (VERY)    /səʊ/ US  /soʊ/
A2 very, extremely, or to such a degree: The house is so beautiful. Thank you for being so patient. Don't be so stupid! I didn't know she had so many children! You can only do so much to help (= there is a limit to how much you can help).UK informal She's ever so kind and nice. I'm so tired (that) I could sleep in this chair! I'm not so desperate as to agree to that. The word itself is so rare as to be almost obsolete.Very and extremeComplete and wholeIntensifying expressions not standard used before a noun or before "not" to emphasize what is being said: Don't wear that - it's so last year (= it was fashionable last year but not now). I'm sorry, but she is so not a size 10 (= she is very much larger than a size 10).Very and extremeComplete and wholeIntensifying expressions used at the end of a sentence to mean to a very great degree: Is that why you hate him so? You worry so!Very and extremeComplete and wholeIntensifying expressions Grammar:SoSee moreGrammar:So + adjective (so difficult), so + adverb (so slowly)We often use so when we mean ‘to such a great extent’. With this meaning, so is a degree adverb that modifies adjectives and other adverbs:See moreGrammar:So much and so manyWe use so before much, many, little and few:See moreGrammar:So as a substitute formSee moreGrammar:So am I, so do I, Neither do IWe use so with be and with modal and auxiliary verbs to mean ‘in the same way’, ‘as well’ or ‘too’. We use it in order to avoid repeating a verb, especially in short responses with pronoun subjects. When we use so in this way, we invert the verb and subject, and we do not repeat the main verb (so + verb [= v] + subject [= s]):See moreGrammar:So as a conjunctionWe use so as a subordinating conjunction to introduce clauses of result or decision:See moreGrammar:So as a discourse markerSee moreGrammar:So: other uses in speakingSo far means ‘up to now’:See more
(Definition of so adverb (VERY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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