English noun: sludge | |||
| 1. | sludge (substance) the precipitate produced by sewage treatment | ||
| Broader (hypernym) | precipitate | ||
| 2. | sludge (substance) any thick, viscous matter | ||
| Synonyms | goo, gook, goop, guck, gunk, muck, ooze, slime | ||
| Broader (hypernym) | matter | ||
| Narrower (hyponym) | sapropel | ||