Wiktionary
n. (context Hinduism English) A term that is related to the ego and egoism - that is, the identification or attachment of one's ego.
Wikipedia
Ahaṃkāra (अहंकार) is a Sanskrit term that is related to the ego and egoism - that is, the identification or attachment of one's ego. The term "ahamkara" comes from an approximately 3,000-year-old Vedic philosophy, where Ahaṃ refers to the concept of the Self or "I" and kāra refers to the concept of "any created thing" or "to do". The term originated in Vedic philosophy over 3,000 years ago, and was later incorporated into Hindu philosophy, particularly Saṃkhyā philosophy.
Ahamkara is one of the four parts of the antahkarana (inner organ) described in Hindu philosophy. The other three parts are Buddhi, Citta and Manas. In the Uttara Mimamsa or vedanta branch of Hindu philosophy, even though it is not discussed in great detail in the Bhagavad Gita, Lord Krishna says to Arjun that ahamkara must be removed - in other words, it should be subordinated to the lord. The reason for this is that the Self is not (cannot be) present when one is in a state of ahankara.
Usage examples of "ahamkara".
It occurred to him that the true nature of Silence was to permit the uninterrupted vibration of the undulatory energy, free from the false conceptions attached to it by the Ahamkara or Ego-making facility, whose assumption that conscious individuality constitutes existence let it to consider its own apparently catastrophic character as pertaining to the order of nature.
The ahamkara appeared to me like a crystal, four hexagonal columns joined to the base (maybe octagonal, am not sure).