The definition of a hap is something happening or that happens by chance.
(noun)An example of a hap is winning the lottery.
See hap in Webster's New World College Dictionary
noun
Origin: ME < ON happ, akin to OE (ge)hæp, convenient, suitable < IE base *kob-, to be fitted to, suit > OIr cob, victory
See hap in American Heritage Dictionary 4
noun
Origin:
Origin: Middle English
Origin: , from Old Norse happ; see kob- in Indo-European roots
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