1. (n.) The juice of plants of any kind, especially the ascending and descending juices or circulating fluid essential to nutrition.

2. (n.) The sapwood, or alburnum, of a tree.

3. (n.) A simpleton; a saphead; a milksop.

4. (v. t.) To subvert by digging or wearing away; to mine; to undermine; to destroy the foundation of.

5. (v. t.) To pierce with saps.

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.

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