Etymology: English dialect fun to hoax, perhaps alteration of Middle English fonnen, from fonne dupe
1. what provides amusement or enjoyment; specifically playful often boisterous action or speech <full of fun> 2. a mood for finding or making amusement <all in fun> 3. a. amusement, enjoyment <sickness takes all the fun out of life> b. derisive jest ; sport, ridicule <a figure of fun> 4. violent or excited activity or argument <let a snake loose in the classroom; then the fun began> Synonyms: fun, jest, sport, game, play mean action or speech that provides amusement or arouses laughter. fun usually implies laughter or gaiety but may imply merely a lack of serious or ulterior purpose <played cards just for fun>. jest implies lack of earnestness in what is said or done and may suggest a hoaxing or teasing <hurt by remarks said only in jest>. sport applies especially to the arousing of laughter against someone <teasing begun in sport led to anger>. game is close to sport and often stresses mischievous or malicious fun <made game of their poor relations>. play stresses the opposition to earnest without implying any malice or mischief <pretended to strangle his brother in play>. II. intransitive verb (funned; funning) Date: 1833 to indulge in banter or play ; joke III. adjective (sometimes funner; sometimes funnest) Date: circa 1846 1. providing entertainment, amusement, or enjoyment <a fun party> <a fun person to be with> 2. full of fun ; pleasant <a fun night> <have a fun time>
New Collegiate Dictionary. 2001.