Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The fox is a treacherous, cunning, lying man, or a deceitful woman. Whoever struggles with a fox is disputing with one of his relatives. Drinking its milk is recovery from illness. Whoever catches a fox will get a woman he loves.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The fox indicates an enemy who lies and equivocates much. Playing with a fox indicates the presence of a treacherous woman in the dreamer's life, or vice versa.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The fox is interpreted as a deceitful man or a cunning woman. Killing it is victory over such a man. Whoever sees a fox fleeing from him has a debt owed by a procrastinating man.