The meaning of REALLY is in reality : actually. How to use really in a sentence.

This room is really hot. That's really interesting. It's a really difficult decision. "Did you like it? Not really (= no)."

REALLY definition: in reality; actually. See examples of really used in a sentence.

Define really. really synonyms, really pronunciation, really translation, English dictionary definition of really. adv. 1. In actual truth or fact: There isn't really a lake there; it's just a mirage.

Definition of really adverb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

This room is really hot. That's really interesting. It's a really difficult decision. "Did you like it? Not really (= no)."

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Discover everything about the word "REALLY" in English: meanings, translations, synonyms, pronunciations, examples, and grammar insights - all in one comprehensive guide.

WordReference Random House Learner's Dictionary of American English © 2026 re•al•ly /ˈriəli, ˈrili/ adv. actually: sees things as they really are. genuinely; truly: a really hot day. indeed: Really, this is too …

Jan 21, 2026 · Adverb really (comparative more really, superlative most really) (literal) In a way or manner that is real, not unreal.