Meaning of CERTAIN(P)

WordNet Dictionary
	Definition:		[adj]  established beyond doubt or question; definitely known; "what is certain is that every effect must have a cause"; "it is certain that they were on the bus"; "his fate is certain"; "the date for the invasion is certain" [adj]  having or feeling no doubt or uncertainty; confident and assured; "felt certain of success"; "was sure (or certain) she had seen it"; "was very sure in his beliefs"; "sure of her friends"
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	Synonyms:		confident(p), convinced(p), definite, indisputable, positive(p), sure, sure as shooting
	Antonyms:		incertain, uncertain, unsure