Third-person singular simple present indicative form of know.(verb)
All persons, singular and plural, present form of know.(verb)
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Use "knows" in a sentence
"And everyone in the room knows--*knows* that if there *are* no questions, this Bataan Death March can end and you can all go home."
"Every man needs help when he's a kid, needs somebody who knows -- _knows_, mind you -- to put him in the right way."
"Yet since the Church is Divine, she knows, not merely guesses or hopes or desires, but _knows_, that _although all things come to an end, God's commandment is exceeding broad_."