What is the meaning of Free?

Unconstrained.

Not imprisoned or enslaved.

Generous; liberal.

Clear of offence or crime; guiltless; innocent.

Without obligations.

To be enjoyed by anyone freely.

Upholding individual rights.

With no or only freedom-preserving limitations on distribution or modification.

Intended for release, as opposed to a checked version.

Obtainable without any payment.

Complimentary.

Unconstrained.

1. In any of various technical senses generic, universal.
   1. Such that any map ${\displaystyle f}$ from ${\displaystyle X}$ to the underlying set of an object ${\displaystyle A}$ in the same category as ${\displaystyle F}$ induces a map ${\displaystyle {\bar {f}}}$ from ${\displaystyle F}$ to ${\displaystyle A}$ which is compatible with ${\displaystyle f}$ (i.e. such that ${\displaystyle f={\bar {f}}\circ i}$).
   2. Having a set of generators which satisfy no non-trivial relations; equivalently, being the group of reduced words on a set of generators.

      In any of various technical senses generic, universal.

      1. Such that any map ${\displaystyle f}$ from ${\displaystyle X}$ to the underlying set of an object ${\displaystyle A}$ in the same category as ${\displaystyle F}$ induces a map ${\displaystyle {\bar {f}}}$ from ${\displaystyle F}$ to ${\displaystyle A}$ which is compatible with ${\displaystyle f}$ (i.e. such that ${\displaystyle f={\bar {f}}\circ i}$).
      2. Having a set of generators which satisfy no non-trivial relations; equivalently, being the group of reduced words on a set of generators.

         Such that any map ${\displaystyle f}$ from ${\displaystyle X}$ to the underlying set of an object ${\displaystyle A}$ in the same category as ${\displaystyle F}$ induces a map ${\displaystyle {\bar {f}}}$ from ${\displaystyle F}$ to ${\displaystyle A}$ which is compatible with ${\displaystyle f}$ (i.e. such that ${\displaystyle f={\bar {f}}\circ i}$).

         Having a set of generators which satisfy no non-trivial relations; equivalently, being the group of reduced words on a set of generators.

         Having a linearly independent set of generators (called a basis).

         Unconstrained by quantifiers.

         Unconstrained of identifiers, not bound.

         That can be used by itself, unattached to another morpheme.

         Unconstrained.

         1. Unobstructed, without blockages.

            Unobstructed, without blockages.

            Unattached or uncombined.

            Not currently in use; not taken; unoccupied.

            Not attached; loose.

            Of a rocket or missile: not under the control of a guidance system after being launched.

            Without; not containing (what is specified); exempt; clear; liberated.

            Ready; eager; acting without spurring or whipping; spirited.

            Invested with a particular freedom or franchise; enjoying certain immunities or privileges; admitted to special rights; followed by of.

            Certain or honourable; the opposite of base.

            Privileged or individual; the opposite of common.

            Without needing to pay.

            Freely; willingly.

            To make free; set at liberty; release.

            To rid of something that confines or oppresses.

            To relinquish (previously allocated memory) to the system.

            Abbreviation of free kick.

            A free transfer.

            The usual means of restarting play after a foul is committed, where the non-offending team restarts from where the foul was committed.

            Abbreviation of freestyle.

            inflection of frear:

            1. first/third-person singular present subjunctive
            2. third-person singular imperative

            first/third-person singular present subjunctive

            third-person singular imperative

            free

            Source: wiktionary.org