| 1. | pertaining to, derived from, or founded on experiment: an experimental science. |
| 2. | of the nature of an experiment; tentative: The new program is still in an experimental stage. |
| 3. | functioning as an experiment or used for experimentation: an experimental airplane. |
| 4. | based on or derived from experience; empirical: experimental knowledge. |
| 5. | something that is experimental. |