English
Adjective
humourous (comparative more humourous, superlative most humourous)
-  (chiefly Britain, uncommon, nonstandard) Alternative spelling of humorous
 
Usage notes
-  The Oxford Dictionary states that "the spelling humourous is regarded as an error" in both British and American English.[1]
 
References
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↑  humorous Oxford Dictionaries. Retrieved: 2014-04-03.