bonus
Concise Oxford English Dictionary © 2008 Oxford University Press:
bonus/ˈbəʊnəs/
▶noun
- 1 a sum of money added to a person's wages for good performance.
■ Brit. an extra dividend or issue paid to shareholders.
- 2 an extra and unexpected welcome event.
– origin C18: from L. bonus (masc.) ‘good’.
'bonus' also found in these Oxford entries:
bonanza
- bonbon
- bonus issue
- boon companion
- bounty
- capot
- Easter egg
- Good King Henry
- gospel
- honour
- lagniappe
- no-claims bonus
- rubber
- slam
- with-profits

