thou thou /ˈðaʊ/

noun

1. The cardinal number that is the product of 10 and 100  ( 1000 , chiliad , G , grand , K , M , one thousand , thou , yard , thousand )
   the cardinal number that is the product of 10 and 100
    There are one thousand meters in a kilometer
   There are one thousand meters in a kilometer
   

pronoun

1. [Archaic] Historical or poetic second person singular pronoun.  ( thou [Archaic] , thyself [Archaic] )
   Historical or poetic second person singular pronoun.