† obliˈmationObs.rare. [n. of action from next.] Covering or stopping up with mud or slime; silting up. 1656Blount Glossogr., Oblimation, a dawbing or covering over with mud or soft clay.1691T. H[ale]Acc. New Invent. p. lxiv, Harbours..destroy'd by Oblimation or Sullage.