Hit
The term Hit refers to skills which hit opponents and trigger on-hit effects. Apart from damage, on-hit effects include inflicting status ailments, gaining charges, Stunning or knocking back enemies, gaining life or mana, and skill-specific effects like 
Infernal Blow's explosion.
Some effects have specific requirements, such as Module Error: No skills found with q_where = skill.active_skill_name="Life Gain on Hit" only working with Attacks, Module Error: No skills found with q_where = skill.active_skill_name="Culling Strike" only affecting enemies with less than 10% life, and 
Voll's ProtectorVoll's Protector
Holy ChainmailArmour: (388-582)
Energy Shield: (82-122)
Movement Speed: -5%Requires Level 35, 53 Str, 53 Int(100-150)% increased Armour and Energy Shield
50% reduced maximum Mana
Gain a Power Charge for each Enemy you hit with a Critical Strike
Inner ConvictionAlthough a great leader during the war,
Voll proved disastrous in times of peace.
's effect needing a critical strike.
This is in contrast to damage over time, debuffs and auras which do not apply on-hit effects.