risible

Definitions:

Having the faculty of laughing; capable of exhibiting laughter; laughable.
- Nuttall's Standard dictionary of the English language. By Nuttall, P.Austin. Published 1914. (adjective) (adj.) (adjective)
Having the faculty or power of laughing; capable of exciting laughter; prone to laugh.
- Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874. (adjective) (adj.) (adjective)
Pertaining to, or exciting, laughter.
- The Clarendon dictionary. By William Hand Browne, Samuel Stehman Haldeman. Published 1894. (adjective) (adj.) (adjective)
Capable of exciting laughter: laughable: amusing.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adjective) (adj.) (adjective)
RISIBLY.
- The american dictionary of the english language. By Daniel Lyons. Published 1899. (adverb) (adv.) (adverb)
Having the faculty or power of laughing; inclined to laugh; causing laughter; used in laughter; as, risible muscles.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (adjective) (adj.) (adjective)
Risibillity.
- The Winston Simplified Dictionary. By William Dodge Lewis, Edgar Arthur Singer. Published 1919. (noun) (n.) (noun)

Usage examples:

Europe was in transports of laughter at a country proclaiming human liberty, while clinging to all the traditions of slavery, and her risible faculties were really excusable in face of such a paradox.
- Abraham Lincoln's Religion by Madison Clinton Peters
He had caught one glance of his hostess's face; and, behind the scenes as he was, that had been so nearly too much for his risible faculties that he dared not hazard another.
- Belles and Ringers by Hawley Smart
The poor fellow uttered these sentiments with such earnestness, that my risible emotions were converted into pity.
- A Morning's Walk from London to Kew by Richard Phillips