a person who engages in a study, sport, or other activity for pleasure rather than for financial benefit or professional reasons. Compare professional.
2.
an athlete who has never competed for payment or for a monetary prize.
3.
a person inexperienced or unskilled in a particular activity: Hunting lions is not for amateurs.
4.
a person who admires something; devotee; fan: an amateur of the cinema.
–adjective
5.
characteristic of or engaged in by an amateur; nonprofessional: an amateur painter; amateur tennis.
Origin: 1775–85; < F, MF < L amātor lover, equiv. to amā- (s. of amāre to love) + -tor-tor, replaced by F -teur (< L -tōr-, obl. s. of -tor); see -eur
am·a·teur (ām'ə-tûr', -tər, -chŏŏr', -chər, -tyŏŏr') n.
A person who engages in an art, science, study, or athletic activity as a pastime rather than as a profession.
Sports An athlete who has never accepted money, or who accepts money under restrictions specified by a regulatory body, for participating in a competition.
One lacking the skill of a professional, as in an art.
adj.
Of or performed by an amateur.
Made up of amateurs: an amateur cast.
Not professional; unskillful.
[French, from Latin amātor, lover, from amāre, to love.] am'a·teur·ism n.
Synonyms: These nouns mean one engaging in a pursuit but lacking professional skill: a musician who is a gifted amateur, not a professional; a dabbler in the stock market; a sculptor but a mere dilettante.
Word History: When Mrs. T.W. Atkinson remarked in her 1863 Recollections of the Tartar Steppes and their Inhabitants, "I am no amateur of these melons," she used amateur in a sense unfamiliar to us. That sense, "a lover, an admirer," is, however, clearly descended from the senses of the word's ultimate Latin source, amātor, "lover, devoted friend, devotee, enthusiastic pursuer of an objective," and from its Latin-derived French source, amateur, with a similar range of meanings. First recorded in English in 1784 with the sense in which Mrs. Atkinson used it, amateur is found in 1786 with a meaning more familiar to us, "a person who engages in an art, for example, as a pastime rather than as a profession," a sense that had already developed in French. Given the limitations of doing something as an amateur, it is not surprising that the word is soon after recorded in the disparaging sense we still use to refer to someone who lacks professional skill or ease in performance.
1784, "one who has a taste for (something)," from Fr. amateur "lover of," from O.Fr., from L. amatorem (nom. amator) "lover," from amatus, pp. of amare "to love" (see Amy). Meaning "dabbler" (as opposed to professional) is from 1786.
[am-uh-choo
r, -cher, -ter, am-uh-tur] 
