nosedive

1 ENTRIES FOUND:
nosedive /ˈnoʊzˌdaɪv/ noun
plural nosedives
nosedive
/ˈnoʊzˌdaɪv/
noun
plural nosedives
Britannica Dictionary definition of NOSEDIVE
[count]
1 
: a sudden sharp drop made by an airplane with its front end pointing toward the ground
2 
: a sudden sharp drop in price, value, condition, etc.