noun

enjoyment, amusement, or light-hearted pleasure.

the children were having fun in the play area

pleasure,entertainment,enjoyment,amusement,excitement,gratification,jollification,merrymaking,leisure,relaxation,relief,respite,rest,refreshment,recreation,diversion,distraction,good time,great time,R and R (rest and recreation),living it up,junketing,a ball,whoopee,beer and skittles,merriment,cheerfulness,cheeriness,cheer,joy,jollity,joviality,jocularity,high spirits,gaiety,mirth,mirthfulness,laughter,hilarity,glee,gladness,light-heartedness,levity,vivacity,liveliness,exuberance,ebullience,buoyancy,perkiness,zest,sunniness,brightness,enthusiasm,vibrancy,vividness,vitality,energy,vigour,vim,sport

adjective

amusing, entertaining, or enjoyable.

it was a fun evening

enjoyable,amusing,diverting,pleasurable,pleasing,agreeable,interesting,entertaining,lively,fun-loving,witty,convivial,clubbable

verb

joke or tease.

no need to get sore—I was only funning