[SF fandom] A Science-fiction convention. Not uSed of other SortS of conventionS, Such aS profeSSional meetingS. ThiS term, unlike many otherS of SF-fan Slang, iS widely recogniSed even by hackerS who aren' t fanS. "We' d been correSponding on the net for monthS, then we met face-to-face at a con." [Jargon File]