Collins English-English Dictionary

slump [sl^mp]

1. 1. vi. [intr] to sink or fall heavily and suddenly

2. 2. vi. to relax ungracefully

3. 3. vi. (of business activity, etc) to decline suddenly; collapse

4. 4. vi. (of health, interest, etc) to deteriorate or decline suddenly or markedly

5. 5. vi. (of soil or rock) to slip down a slope, esp a cliff, usually with a rotational movement

6. 6. n a sudden or marked decline or failure, as in progress or achievement; collapse

7. 7. n a decline in commercial activity, prices, etc

8. 8. n another word for depression

9. 9. n [economics] the act of slumping

10. 10. n a slipping of earth or rock; landslide

11. 11. n [Etymology] C17: probably of Scandinavian origin; compare Low German slump bog, Norwegian slumpa to fall