verb ·Rare ·Advanced level

Definitions

Verb

1. 1
   To drain the surface of (a field, farm, etc.). transitive
2. 2
   To drain water or fluid from the top of a water heater or heating system, rather than from the bottom.

Etymology

From top + drain.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.