The potter's field, said to have lain south of Jerusalem, purchased with the bribe which Judas took for betraying his Master, and therefore called the field of blood
2
a disloyal person who betrays or deserts his cause or religion or political party or friend etc.
3
an act of deliberate betrayal n
4
plural of betrayer n one who reveals confidential information in return for money n a person who says one thing and does another