1540s, ridyculouse, from Latin ridiculosus "laughable," from ridiculus "that which excites laughter," from ridere "to laugh." Shakespeare and other 17c. writers sometimes spelled it rediculous. Slang extensions to "outrageous" (1839); "excellent" (1959, jazz slang). Related: Ridiculously; ridiculousness.
1. The deal seems so attractive it would be ridiculous to say no.
2. The film starts off realistically and then develops into a ridiculous fantasy.
3. Ludlam was responsible for making Ridiculous Theatre something of a cult.
4. It is ridiculous to suggest we are having a romance.
5. At times the show veered from the sublime to the ridiculous.