What is the meaning of 大夫?

(medical) doctor

A governmental job title used during the Spring and Autumn period, the Warring States period and the early Chinese dynasties, whose responsibilities encompassed managing royal and court affairs, often translated as "senior official", "high officer" or "great officer".

large, dry field

a surname

an office in Zhou Dynasty, China.

substitutive style of high ranked courtier, particularly officers in the 5th rank (五位).

(historical, in Japan, also daibu) head of shoku() or (), administrative departments of the imperial court.

karō (家老)

pine tree (based in an episode Qin Shi Huangdi or the First Emperor of Qin granted a pine tree the dignity of Taifu [1.])

style of Shinto shrine headmaster.

(in Noh-theater) iemoto or the head master of shite (シテ) acting family.

(in jōruri/bunraku-theater) style of narrators and shamisen players.

highest ranked prostitutes at the officially approved prostitution areas, such as, Yoshiwara.

leading actor in a manzai pair

style of Shinto shrine headmaster

Source: wiktionary.org