prep

• From one side or end of (something) to the other.
  "Have you got through all those chocolates already?!"
• (Canada, US) To (or up to) and including, with all intermediate values; to... inclusive; until the end of.
  "from 1945 through 1991;  the numbers 1 through 9;  your membership is active through March 15, 2013"

adj

• (chiefly US) Finished; complete.
  "They were through with laying the subroof by noon."
• (soccer) In possession of the ball beyond the last line of defence but not necessarily the goalkeeper; through on goal.
  "With the Swifts calling for offside the striker was through and only a great save from McIlravey prevented the opener."
• (chiefly UK, Commonwealth, Ireland, rare in Canada) (usually followed by "to") Able to progress (to the next stage or a higher level) following success in an exam, sports match, etc.
  "Manchester United are through to the FA Cup Final for the thirteenth time."

adv

• (mostly in the phrase 'get through') So as to connect or reach.
  "I've been ringing my bank all day, and finally I've got through."

noun

• (obsolete) A coffin, sarcophagus or tomb of stone; a large slab of stone laid on a tomb, or in a dry-stone wall from one side to the other; a perpend.