to taste food or drink in order to see what it is like:
a chance to sample the local food
to choose some people from a larger group in order to ask them questions or get information from them:
18% of the adults sampled admitted having had problems with alcohol abuse.
to try an activity, go to a place etc in order to see what it is like:
Here's your chance to sample the delights of country life.
to use a small part of a song from a CD or record in a new song:
Many of his songs have been sampled by other artists.