adj. 25B6; preposition
we drove through the tunnel : INTO AND OUT OF, to the other/far side of, from one side to the other of.
he got the job through an advertisement : BY MEANS OF, by way of, by dint of, via, using, thanks to, by virtue of, as a result of, as a consequence of, on account of, owing to, because of.
he worked through the night : THROUGHOUT, all through, for the duration of, until/to the end of.
25B6; adverb
as soon as we opened the gate they came streaming through : FROM ONE SIDE TO THE OTHER, from one end to another, in and out the other side.
I woke up, but Anthony slept through : THE WHOLE TIME, all the time, from start to finish, without a break, without an interruption, non-stop, continuously, throughout.
25B6; adjective a through train : DIRECT, non-stop.
25A0; through and through IN EVERY RESPECT, to the core; thoroughly, utterly, absolutely, completely, totally, wholly, fully, entirely, unconditionally, unreservedly, altogether, out-and-out.