Dictionary Definition:
ava-√sthā P. -tiṣṭhati (impf. -atiṣṭhat
• aor. Subj. -sthāt
• perf. Ā. 3. sg. -tasthe
• perf. p. P. -tasthivás) 'to go down into (acc.), reach down to (acc.) RV. ŚBr
• (aor. Subj. 2. pl. -sthāta), to go away from (abl.) RV. v, 53, 8
• (aor. Subj. 1. sg. -stkam) to be separated from or deprived of (abl.) RV. ii, 27, 17: Ā. (Pāṇ. 1-3, 22
• rarely P., e.g. Bhag. xiv, 23 BhP. &c.) to take one's stand, remain standing ĀśvGṛ. &c
• to stay, abide, stop at any place (loc.) MBh. &c
• to abide in a state or condition (instr.) MBh. i, 5080 BhP. &c
• (with ind. p.) to remain or continue (doing anything) MBh. i, 5770 ; iii, 187 (ed. Bomb.), &c
• to be found, exist, be present MBh. Yājñ. i, 272, &c
• (perf. 1, sg. -tasthe) to fall to, fall into the possession of (dat.) RV. x, 48, 5
• to enter, be absorbed in in (loc.) Mn. vi, 81 [Page 106, Column 1]
• to penetrate (as sound or as fame) MBh. xiii, 1 845: Pass. -sthīyate, to be settled or fixed or chosen Śak.: Caus. (generally ind. p. -sthāpya) to cause to stand or stop (as a carriage or an army &c.), let behind MBh. &c
• to place upon (loc.), fix, set, array ĀśvGṛ. &c
• to cause to enter or be absorbed in (loc.) MBh. iii, 12502
• to render solid or firm R. v, 35, 36
• to establish (by arguments) Comm. on Nyāyad.: Pass. Caus. -sthāpyate, to be kept firm ['to be separated' BR.] BhP