(Thanks to dictionary.com)
free
adj. freer, freest
1. Not imprisoned or enslaved; being at liberty.
2. Not controlled by obligation or the will of another: felt free to go.
3.
1. Having political independence: "America... is the freest and wealthiest nation in the world" (Rudolph W. Giuliani).
2. Governed by consent and possessing or granting civil liberties: a free citizenry.
3. Not subject to arbitrary interference by a government: a free press.
4.
1. Not affected or restricted by a given condition or circumstance: a healthy animal, free of disease; free from need.
2. Not subject to a given condition; exempt: income that is free of all taxes.
5. Not subject to external restraint: "Comment is free but facts are sacred" (Charles Prestwich Scott).
6. Not literal or exact: a free translation.
7.
1. Costing nothing; gratuitous: a free meal.
2. Publicly supported: free education.
8.
1. Not occupied or used: a free locker.
2. Not taken up by scheduled activities: free time between classes.
9. Unobstructed; clear: a free lane.
10. Unguarded in expression or manner; open; frank.
11. Taking undue liberties; forward or overfamiliar.
12. Liberal or lavish: tourists who are free with their money.
13. Given, made, or done of one's own accord; voluntary or spontaneous: a free act of the will; free choices.
14. Chemistry & Physics.
1. Unconstrained; unconfined: free expansion.
2. Not fixed in position; capable of relatively unrestricted motion: a free electron.
3. Not chemically bound in a molecule: free oxygen.
4. Involving no collisions or interactions: a free path.
5. Empty: a free space.
6. Unoccupied: a free energy level.
15. Nautical. Favorable: a free wind.
16. Not bound, fastened, or attached: the free end of a chain.
17. Linguistics.
1. Being a form, especially a morpheme, that can stand as an independent word, such as boat or bring.
2. Being a vowel in an open syllable, as the o in go.
adv.
1. In a free manner; without restraint.
2. Without charge.