Let's say that I am in melee with an enemy. On my turn, for one reason or another, I take the Disengage action but do not move out of melee range.
In the same round, the enemy starts their turn by moving out of my reach.
The PHB says [emphasis mine]:
If you take the Disengage action, your movement doesn’t provoke opportunity attacks for the rest of the turn.
The phrase "the turn" is ambiguous as to whether it is only my turn.
According to RAW, does the Disengage action negate my ability to take an Opportunity Attack? Should I get an Opportunity Attack in this situation?