feat
noun
an achievement that requires great courage, skill, or strength.
synonyms: achievement, accomplishment, attainment, coup, triumph
This is the intended definition. It is a thing you can do because you have trained, have some kind of magic heritage or some innate talent.
Picking a lock in half the time other rogues can do it is a feat of skill. Slamming into someone and knocking them to the ground is a feat of strength. Tossing a fireball into a swirling melee, blasting the enemy to smithereens and leaving your friends unscathed is a feat of magic.