An extra payment (lump-sum) given in addition to regular salary, commonly paid in summer or at year-end by companies.
今年は夏のボーナスが少なかった。
This year's summer bonus was small.
会社は業績が良くて年末にボーナスを出した。
The company gave a year-end bonus because business was good.
ボーナスで旅行に行きたい。
I want to go on a trip using my bonus.