Avidyā (Sanskrit; Pāli: avijjā; Tibetan phonetic: ma rigpa) is commonly translated as "ignorance" or "delusion". It can be defined as not understanding the full meaning and implication of the four noble truths or as a fundamental misunderstanding of the nature of reality.

Avidyā (Sanskrit; Pāli: avijjā; Tibetan phonetic: ma rigpa) is commonly translated as "ignorance" or "delusion". It can be defined as not understanding the full meaning and implication of the four noble truths or as a fundamental misunderstanding of the nature of reality.

Avidyā is identified within the Buddhist teachings as follows:

The first link in the twelve links of dependent origination.

One of the three poisons within the Mahayana Buddhist tradition.

One of the six root kleshas within the Mahayana Abhidharma teachings

One of the ten fetters in the Theravada tradition

Equivalent to moha within the Theravada Abhidharma teachings

Within the context of the twelve links of dependent origination, avidya is typically symbolized by a person who is blind or wearing a blindfold.

For more info see the Wiki.