| opera | (of e.g. a machine) performing or capable of performing |
|---|---|
| opera | relating to or requiring or amenable to treatment by surgery especially as opposed to medicine |
| opera | effective |
| opera | of or relating to a surgical operation |
| opera | the area that is open during surgery |
| opera | by means of an operative |
| opera | (informal) a shrewd or unscrupulous person who knows how to circumvent difficulties |
| opera | an agent that operates some apparatus or machine |
| opera | someone who owns or operates a business |
| opera | a speculator who trades aggressively on stock or commodity markets |
| opera | (mathematics) a symbol that represents a function from functions to functions |
| opera | a gene that activates the production of messenger RNA by adjacent structural genes |