The only practical and widely used definition of open source is the one known as the Open Source Definition published by the OSI.
The set of free/libre licenses (as defined by the FSF) is almost identical to the set of open sources licenses (as defined by the OSI).
The debate within FOSS communities has been between copyleft licenses like the GPL, and permissive licenses like the MIT licence. Both copyleft and permissive licenses are considered free/libre by the FSF, and both of them are considered open source by the OSI.
The set of free/libre licenses (as defined by the FSF) is almost identical to the set of open sources licenses (as defined by the OSI).
The debate within FOSS communities has been between copyleft licenses like the GPL, and permissive licenses like the MIT licence. Both copyleft and permissive licenses are considered free/libre by the FSF, and both of them are considered open source by the OSI.