From Longman Dictionary of Contemporary Englishslumpslump1 /slʌmp/ ●○○ verb 🔊 🔊 1FALL[intransitive] to fall or lean against something because you are not strong enough to standslump against/over/back etc 🔊 She slumped against the wall. 🔊 Carol slumped back in her chair, defeated. 🔊 Ben staggered and slumped onto the floor.2FAIL[intransitive] to suddenly go down in price, value, or number opp soar 🔊 Sales slumped by 20% last year.slump to 🔊 The currency slumped to a record low.3[intransitive, transitive] (also be slumped) if your shoulders or head slump or are slumped, they bendforward because you are unhappy, tired, or unconscious 🔊 Her shoulders slumped and her eyes filled with tears.→ See Verb table
slumpslump2 ●○○ noun [countable usually singular] 🔊 🔊 1LESSa suddendecrease in prices, sales, profits etcslump in 🔊 a slump in car sales2PEa period when there is a reduction in business and many people lose their jobs opp boom 🔊 The war was followed by an economic slump. 🔊 a worldwide slump3especially American EnglishDS a period when a player or team does not play wellin a slump 🔊 The Dodgers have been in a slump for the last three weeks.