n. One who admires; an admirer; a lover.n. One who has an especial love for any art, study, or pursuit, but does not practise it.n. Most commonly, one who cultivates any study or art from taste or attachment, without pursuing it professionally or with a view to gain: often used of one who pursues a study or an art in a desultory, unskilful, or non-professional way.n. Specifically, in sporting and athletics, an athlete who has never competed in a match open to all comers, or for a stake, or for public money, or for gate-money, or under a false name, or with a professional for a prize, and has never taught or pursued athletic exercises as a means of support.Pertaining to or having the character of an amateur: as, amateur work; an amateur pianist.