Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The barber in a dream is a man who takes people's money unjustly. He may also indicate a man who benefits people and removes their worries. Shaving the head with him is payment of debt and removal of worry.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The barber indicates a policeman or a tax collector. Shaving hair out of its proper season indicates poverty and dismissal from a position.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The barber is interpreted as a man who distinguishes between truth and falsehood. Shaving with him indicates repentance and security from fear.