No Rabbi does not mean teacher. It means most great one.
It implies godly powers to alter Yehova’s word.
That is why Yeshua forbid to call men Rabbi or Father.
RABBI
In the Old Testament the title rab referred to any eminent holder of an office. Rabbi literally means “my master.” In the New Testament it is the honorable name by which the Disciples addressed Jesus as their Master (Matthew 23:7; John 1:38). Soon after the apostolic age it became the recognized title of Jewish religious teachers, and all modern Jewish clergy are called rabbis. (Etym. Aramaic rab, master + first person pronomian suffix: my master.)
All items in this dictionary are from Fr. John Hardon’s Modern Catholic Dictionary, © Eternal Life. Used with permission.
rab·bi1 /ˈræbaɪ/ Show Spelled [rab-ahy] Show IPA noun, plural rab·bis. 1. the chief religious official of a synagogue, trained usually in a theological seminary and duly ordained, who delivers the sermon at a religious service and performs ritualistic, pastoral, educational, and other functions in and related to his or her capacity as a spiritual leader of Judaism and the Jewish community. Compare cantor
( def 2 ) . 2. a title of respect for a Jewish scholar or teacher.