(1):
(n.) The sapwood, or alburnum, of a tree.
(2):
(n.) A simpleton; a saphead; a milksop.
(3):
(v. t.) To subvert by digging or wearing away; to mine; to undermine; to destroy the foundation of.
(4):
(v. t.) To pierce with saps.
(5):
(n.) The juice of plants of any kind, especially the ascending and descending juices or circulating fluid essential to nutrition.
(6):
(v. t.) To make unstable or infirm; to unsettle; to weaken.
(7):
(v. i.) To proceed by mining, or by secretly undermining; to execute saps.
(8):
(n.) A narrow ditch or trench made from the foremost parallel toward the glacis or covert way of a besieged place by digging under cover of gabions, etc.