(1) The act of conducting a controlled test or investigation
(2) A venture at something new or different
"As an experiment he decided to grow a beard"
(3) The testing of an idea
"It was an experiment in living"
"Not all experimentation is done in laboratories"
(4) To conduct a test or investigation
"We are experimenting with the new drug in order to fight this disease"
(5) Try something new, as in order to gain experience
"Students experiment sexually"
"The composer experimented with a new style"
From experiment (French: expérience), from experimentum.