Define through. through synonyms, through pronunciation, through translation, English dictionary definition of through. by way of: We’ll be driving through Seattle.; finished: We’ll be through with the project by tonight. The meaning of THROUGH is —used as a function word to indicate movement into something at one side or point and out at another and especially the opposite side of. How to use through in a sentence. Though is fine conjunction. It's no "but" or "however", though it is a useful word, when you want let a reader know that two ideas are opposing one another. though /ðəʊ/ conj (subordinating) (sometimes preceded by even) despite the fact that: though he tries hard, he always fails, poor though she is, her life is happy adv nevertheless; however: he can't dance: he sings well, though Etymology: Old English theah; related to Old Frisian thāch, Old Saxon, Old High German thōh, Old Norse thō