know in WordNet English dictionary

1. accept (someone) to be what is claimed or accept his power and authority
   "The Crown Prince was acknowledged as the true heir to the throne"; "We do not recognize your gods"
   acknowledge  recognize  recognise  know 
   
2. be cognizant or aware of a fact or a specific piece of information; possess knowledge or information about
   "I know that the President lied to the people"; "I want to know who is winning the game!"; "I know it's time"
   know  cognize  cognise 
   
3. have firsthand knowledge of states, situations, emotions, or sensations
   "I know the feeling!"; "have you ever known hunger?"; "I have lived a kind of hell when I was a drug addict"; "The holocaust survivors have lived a nightmare"; "I lived through two divorces"
   know  experience  live 
   
4. have sexual intercourse with
   "This student sleeps with everyone in her dorm"; "Adam knew Eve"; "Were you ever intimate with this man?"
   sleep together  roll in the hay  love  make out  make love  sleep with  get laid  have sex  know  do it  be intimate  have intercourse  have it away  have it off  screw  fuck  jazz  eff  hump  lie with  bed  have a go at it  bang  get it on  bonk 
   
5. be familiar or acquainted with a person or an object
   "She doesn't know this composer"; "Do you know my sister?"; "We know this movie"; "I know him under a different name"; "This flower is known as a Peruvian Lily"
   know 
   
6. be aware of the truth of something; have a belief or faith in something; regard as true beyond any doubt
   "I know that I left the key on the table"; "Galileo knew that the earth moves around the sun"
   know 
   
7. know how to do or perform something
   "She knows how to knit"; "Does your husband know how to cook?"
   know 
   
8. know the nature or character of
   "we all knew her as a big show-off"
   know 
   
9. be able to distinguish, recognize as being different
   "The child knows right from wrong"
   know 
   
10. perceive as familiar
    "I know this voice!"
    know 
    
11. have fixed in the mind
    "I know Latin"; "This student knows her irregular verbs"; "Do you know the poem well enough to recite it?"
    know 
    

1. the fact of being aware of information that is known to few people
   "he is always in the know"
   know