Dictionary Definition:
á-bhva ṛV. or a-bhvâ āV. or abhvá "ṣBr., mfn. (cf. a-bhuva) monstrous, immense, terrible RV. i, 39, 8 and 63, 1
• (am), n. immense power, monstrosity, horror RV. ŚBr
• a monster RV. vi, 71, 5 AV. ŚBr