(a)Shirk means associating partner(s) with Allah and it is the opposite of Monotheism (Tawḥīd).
(b) Types:
*Shirkul- Akbar(Major Shirk).
*Shirkul- Aṣghar (Minor Shirk).
Shirkul- Akbar is a major Shirk which constitute apostasy.
Shirk condemns the persons who practice it to Hell.
Examples:
*Atheism- Disbelief in Allah.
*Idol Worship.
*Hero Worship.
*Dualism.
*Trinity.
*Ancestral worship.
*Making a vow with other being other than Allah.
*Seeking supernatural help and aid from other than Allah.
*Making a middle- man (intercessor) between oneself and Allah.
*Palm reading or fortune telling.
Shirkul-Aṣghar is a minor shirk which does not constitute apostasy.
Its defects could lead to major Shirk.
Examples:
*Utterances, such as swearing by another deity other than Allah.
*Actions, such as wearing a ring or an amulet to ward off evil.
*>Ar-Riyā'u- show off.
*Hidden Shirk i.e. inwardly dissatisfied with the decree of Allah.
*Belief in superstitions.