Used other than figuratively or idiomatically: see free, hand.
free rein
An artifact or document rendering something allowed or legal.
A pompano of the species Trachinotus falcatus.
A learner's permit.
To allow (something) to happen, to give permission for.
To allow for, to make something possible.
To allow, to admit (of).
To grant formal authorization for (something).
To attempt to obtain or succeed in obtaining formal authorization for (something).
To allow (someone) to do something; to give permission to.