What does ṭāghūt mean?

Imām Ibn al-Jawzī (d. 597/1201) summarized the scholars' opinions in his book "Zād al-Masīr" as follows:

1. The devil(s). [ʿUmar, Ibn ʿAbbās, Mujāhid, al-Shaʿbī, al-Suddī, Muqātil, and others]
2. Soothsayers. [Saʿīd ibn Jubayr, Abū al-ʿĀliyah]
3. Sorcerers. [Muḥammad ibn Sīrīn]
4. Idols. [Al-Yazīdī, al-Zajjāj]
5. The rebellious ones among the People of the Book. [Mentioned by al-Zajjāj also]