The revised definition of "sexual preference" that happened on 10/14/20 in response to politics illustrates why electronic media needs to be viewed with skepticism. The term was generally, in common usage, not considered offensive until yesterday until Senator Hirono redefined it on 10/14.
The apparent fact that a political activist within the organization can instantly update the meaning of a phrase to suit their beliefs invalidates the reliability of this online dictionary as an impartial reference source.
I will never again have any use M-W as a reference.