Dictionary game

You look up a word in a dictionary ( http://dictionary.com ) then put the definition here for people to guess what word it is.

1.   a structure spanning and providing passage over a river, chasm, road, or the like.

hmm

there are two major flaws:
two or more words can have the same meaning..
and
If you gimme something, i'll just look those words up in the dictionary.

So good idea but you need to improvise.