Page. 229 of the Core Rule book states
If an attacking character is adjacent to his target, both the character and his target are considered to be engaged in melee.
When it says "attacking" character, does it mean that the PC/NPC is required to have actually made an Attack Action or is it simply referring to the current 'actor'.
An example would be something like;
Thrash the under-hive ganger is out of Charge range of Grendal, the Confessor. As Grendal is only armed with a melee weapon he chooses use a Full Action to Run to Thrash ending his turn adjacent to the NPC under-hiver.
Would that have Grendal and Thrash 'engaged in melee' or are they simply standing next to one and other?