I have to work with this A LOT in my field of work AND study - I am a museum studies grad student. We have to look at objects that come from different times and places (many not our own time nor place) and assess meanings. To do this we need CONTEXT - this is why museums speak so forcefully about prevanance and provenience. This is because understanding those cultural thought processes which brought the object into existence are also the ones that gave it the meaning...which isn't necessarily the meaning *I* would give it, looking at it from the POV of another place and time.
For instance.....How many fine art museums display ritual objects or even mundane objects as fine art although they were never intended in their time and place to be fine art - eg a Greek amphora. So, which meaning is the RIGHT meaning? The one where it is a functional device in which to carry olive oil or wine or as an object to be admired for its form and history? I would argue that both are valid.
For anyone confused on the concepts of post-modernist thought, a fantastic thing to watch to help explain it is an episode of Firefly called "Objects in Space".
"It is just an object. It doesn't mean what you think it means." This said by a characters who is seeing a gun like a tree branch (just a part of nature) to her crewmates who are seeing it as a deadly weapon.
The antagonist of the episode, a bounty hunter, asks of a characters room "Is it still her room when she's not in it?"
For instance, on my desk is a square peice of wood and in its center is a peice of glass. Obstensibly this is a picture frame - but right now it holds a piece of decorative paper and a fortune from a cookie - so is it STILL a picture frame?
This is not to say that things are meaningLESS. Just that there is more to a meaning than meets the eye

Oh - and I LOVE TEA! (see, we're still on topic!)