1. expansion, breadth; instr. vitthārena in breadth Mil.17; same abl. vitthārato Ja.i.49
2. extension, detail; often in C. style, introducing detailed explanation of the subject in question, either with simple statement “vitthāro” (i.e. here the foll detail; opp. saṅkhepa), e.g. DN-a.i.65, DN-a.i.229; Snp-a.325 [cp. same in BSk. “vistaraḥ,” e.g. Divy.428], or with compounds -kathā Snp-a.464; Pv-a.19; -desanā Snp-a.163 -vacana Snp-a.416. Thus in general often in instr. or abl. as adv. “in detail,” in extenso (opp. sankhittena in short): vitthārena DN.iii.241; SN.iv.93; AN.ii.77, AN.ii.177 AN.ii.189; AN.iii.177; Pp.41; Pv-a.53, Pv-a.113; vitthārato Vism.351, Vism.479; Pv-a.71, Pv-a.77, Pv-a.81. Cp. similarly BSk. vistarena kāryaṃ Divy.377.

fr, vi + stṛ.