verb

• (transitive) To perceive the truth or factuality of; to be certain of; to be certain that.
  "Question things. I have the most fun when I'm writing questioning things that people do not question- the assumptions that everybody knows are true."
• (intransitive) To be or become aware or cognizant.
  "Did you know Michelle and Jack were getting divorced? ― Yes, I knew."
• (transitive) To be aware of; to be cognizant of.
  "Did you know Michelle and Jack were getting divorced? ― Yes, I knew."
• (intransitive, obsolete) To be acquainted (with another person).
  "You, and I haue knowne ſir."

noun

• (rare) Knowledge; the state of knowing.
  "That on the view and know of theſe Contents, […] He ſhould the bearers put to […] death, […]"

particle

• (Singlish) Used at the end of a sentence to draw attention to information one thinks the listener should keep in mind.
  "Make sure you water the plants, know…"