Definitions
1.NounThe rapid, uncontrollable descent of an aircraft in a steep spiral."The loss of the third engine threw the plane into a tailspin."
2.NounA severe mental or emotional collapse; emotional breakdown."Just hours after leaving the institution, she suffered another tailspin."
3.NounAny sharp, sustained, often uncontrollable descent or decline."The present stock tailspin proves bankruptcy is imminent."
4.VerbOf an aircraft: to go into a rapid, uncontrollable descent in a steep spiral.
5.VerbTo go into a sharp, sustained, often uncontrollable descent or decline.