Dictionary Definition:
índra m. (for etym. as given by native authorities Nir. x, 8 Sāy. on RV. i, 3, 4 Uṇ. ii, 28
• according to BRD. fr. in = √inv with suff. ra preceded by inserted d, meaning 'to subdue, conquer' [Page 166, Column 2]
• according to Muir, S. T. v, 119, for sindra fr. √syand, 'to drop'
• more probably from √ind, 'to drop', q.v., and connected with indu above), the god of the atmosphere and sky
• the Indian Jupiter Pluvius or lord of rain (who in Vedic mythology reigns over the deities of the intermediate region or atmosphere
• he fights against and conquers with his thunder-bolt [vajra] the demons of darkness, and is in general a symbol of generous heroism
• indra was not originally lord of the gods of the sky, but his deeds were most useful to mankind, and he was therefore addressed in prayers and hymns more than any other deity, and ultimately superseded the more lofty and spiritual Varuṇa
• in the later mythology indra is subordinated to the triad Brahman, Vishṇu, and Śiva, but remained the chief of all other deities in the popular mind)
RV. AV. ŚBr. Mn. MBh. R. &c. &c
• (he is also regent of the east quarter, and considered one of the twelve Ādityas) Mn. R. Suśr. &c
• in the Vedānta he is identified with the supreme being
• a prince
• ifc. best, excellent, the first, the chief (of any class of objects
• cf. surêndra, rājêndra, parvatêndra, &c.) Mn. Hit.
• the pupil of the right eye (that of the left being called Indrāṇī or Indra's wife) ŚBr. BṛĀrUp.
• the number fourteen, Sūryas
• N. of a grammarian
• of a physician
• the plant Wrightia Antidysenterica ( See kuṭaja) L.
• a vegetable poison L.
• the twenty-sixth Yoga or division of a circle on the plane of the ecliptic
• the Yoga star in the twenty-sixth Nakshatra, ? Pegasi
• the human soul, the portion of spirit residing in the body
• night L.
• one of the nine divisions of Jambu-dviipa or the known continent L.
• (ā), f. the wife of Indra, See indrāṇī
• N. of a plant L.
• (ī), f. N. of an attendant of Devii