power or capacity to do or act physically, mentally, legally, morally, financially, etc.

competence in an activity or occupation because of one's skill, training, or other qualification

the ability to sing well.

abilities, talents; special skills or aptitudes

Composing music is beyond his abilities.

noun

impotence , inability , limitation , paralysis , clumsiness , ignorance , inadequacy , inanity , incompetence , stupidity , weakness , incapability

noun

aptitude , capability , capacity , competence , competency , comprehension , dexterity , endowment , facility , faculty , intelligence , might , potentiality , qualification , resourcefulness , skill , strength , talent , understandingnotes:applied to a person , ability and capacity mean about the same thing but are grammatically different: an ability to do something , a capacity for doing something; ability is qualitative while capacity is quantitative , particular activity adeptness , adroitness , bent , cleverness , command , craft , deftness , expertise , expertness , finesse , flair , genius , gift , handiness , ingenuity , knack , know-how , mastery , mind for , proficiency , savvy , skillfulness , the goods , the right stuff , what it takesnotes:applied to a person , adeptness , art , technique , ambidexterity , attainment , caliber , dynamism , efficiency , energy , force , potential , power , versatility