Using words in context

We had another example this week of how one's context forms one's vocabulary.   I asked T to share a word from her Megaword book with the class.   She suggested "deliberate."  L said, "That's what a jury does when it leaves the room."  Ah, yes--but not the first meaning I would have thought of.  It reminded me of the definition I have heard more than once for "decline"--a word on a reading inventory I often use.  "Decline?--that's when your credit card gets declined."