having or showing or requiring special skill; "only the most skilled gymnasts make an Olympic team"; "a skilled surgeon has many years of training and experience"; "a skilled reconstruction of her damaged elbow"; "a skilled trade"
shaped or conditioned or disciplined by training; often used as a combining form; "a trained mind"; "trained pigeons"; "well-trained servants"
having acquired necessary skills by e.g. undergoing a course of study; "a trained nurse"; "a trained voice"; "trained manpower"; "psychologically trained workers"
official permission or approval; "authority for the program was renewed several times"
the power or right to give orders or make decisions; "he has the authority to issue warrants"; "deputies are given authorization to make arrests"; "a place of potency in the state"
an authoritative written work; "this book is the final authority on the life of Milton"
an expert whose views are taken as definitive; "he is an authority on corporate law"
(usually plural) persons who exercise (administrative) control over others; "the authorities have issued a curfew"
serve as a teacher or trusted counselor; "The famous professor mentored him during his years in graduate school"; "She is a fine lecturer but she doesn't like mentoring"