Apte Sanskrit-English Dictionary
n. [tam-asun] 1 Darkness; kiṃ vā'bhaviṣyadaruṇastamasāṃ vibhettā taṃ cetsa- hasrakiraṇo dhuri nākariṣyat Ś. 7. 4; V. 1. 7; Me. 37.
2 The gloom or darkness of hell; Ms. 4. 242.
3 Mental darkness, illusion, error; munisutā- praṇayasmṛtirodhinā mama ca muktamidaṃ tamasā manaḥ Ś. 6. 7.
4 (In Sān. phil.) Darkness or ignorance, as one of the three qualities or constituents of every thing in nature (the other two...