some·thing / ˈsəmˌ[unvoicedth]ing/ • pron. 1. a thing that is unspecified or unknown: we stopped for something to eat I knew something terrible had happened something about her frightened me.2. used in various expressions indicating that a description or amount being stated is not exact: a wry look, something between amusement and regret grassland totaling something over three hundred acres there were something like fifty applications.• adv. 1. inf. used for emphasis with a following adjective functioning as an adverb: my back hurts something terrible.2. archaic or dial. to some extent; somewhat: the people were something scared.PHRASES: or something inf. added as a reference to an unspecified alternative similar to the thing mentioned: you look like you just climbed a mountain or something.really (or quite) something inf. something considered impressive or notable: Want to see the library? It's really something.something else inf. an exceptional person or thing: the reaction from the crowd was something else.something of to some degree: Richard was something of an expert at the game.something or othersee other.there is something in/to —— —— is worth considering; there is some truth in ——: perhaps there is something to his theory I think there's something in this alien business.thirty-something (forty-something, etc.) inf. an unspecified age between thirty and forty (forty and fifty, etc.): I'm guessing she's forty-something. ∎  of or relating to a person between thirty and forty (forty and fifty, etc.): this music appeals more to your thirty-something crowd.