According to the Oxford English Dictionary:
1. The power or right to act, speak, or think as one wants
1.1 Absence of subjection to foreign domination or despotic government
1.2 The power of self-determination attributed to the will; the quality of being independent of fate or necessity
2. The state of not being imprisoned or enslaved
2.1 The state of being unrestricted and able to move easily
This is all fine and good however the concept of freedom and some of the above definitions highly contextual are open to the interpretation of the reader. In effect, one person’s freedom is another person’s imprisonment.