engaged in as a pastime; "an amateur painter"; "gained valuable experience in amateur theatricals"; "recreational golfers"; "reading matter that is both recreational and mentally stimulating"; "unpaid extras in the documentary"
In chess, a non-master. At the US Amateur, masters cannot play.At the US Amateur Team tournaments, the team has to average below master rating. Note: in chess, amateurs can win money, sometimes quite a bit at tournaments like the World Open.
Like in sports, amateur porn features individuals who are not professional porn stars. It features ordinary individuals partaking in every day sexual acts. Girl/boy next door, wives/husbands, girlfriends/boyfriends. Sometimes real amateurs but quite often professional models just pretending.
Works created for private, not commercial use, such as home movies, designed to be shown primarily to family and friends, placed on personal Web sites, and usually made by people not professionally connected with the film/video industry.
The word amateur has at least two connotations. In the first, more widely used manner, it means someone performing some task without pay, in contrast to a "professional" who is paid for the same task. In this sense, labeling someone an "amateur" can have a negative connotation.
In its purest form, amateur porn features performers who are not pro porn stars. These are men, women and transsexuals that are fresh to the adult industry, untainted by the benefits of over-acting and fake orgasms.