'Sortition' definitions:

Definition of 'sortition'

(from WordNet)
noun
Making a chance decision by using lots (straws or pebbles etc.) that are thrown or drawn [syn: casting lots, drawing lots, sortition]

Definition of 'Sortition'

From: GCIDE
  • Sortition \Sor*ti"tion\, n. [L. sortitio, from sortiri to draw or cast lots, fr. sors, sortis, a lot.] Selection or appointment by lot. [Obs.] --Bp. Hall. [1913 Webster]