nosedive

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go into a nosedive

1. Of an aircraft, to go into a sudden and rapid descent toward the ground leading with the nose of the plane. Everyone started panicking when we went into a nosedive, but the skilled pilot managed to regain control of the plane and landed it safely.
2. Of a person, to fall toward the ground face first. I was so distracted by the girl I like in class that I ended up tripping and going into a nosedive right in front of her.
3. By extension, to suddenly and rapidly begin to decline in physical, emotional, or psychological health or stability; to suffer a sudden loss or decline in value or success. My father held out bravely in his fight against cancer, but I'm afraid he's gone into a nosedive in the last couple of weeks. Shares in the company are going into a nosedive ever since news of the tax scandal went public.
See also: nosedive

take a nosedive

1. Of an aircraft, to go into a sudden and rapid descent toward the ground leading with the nose of the plane. Everyone went into a panic when we started taking a nosedive, but the skilled pilot managed to regain control of the plane and landed it safely.
2. Of a person, to fall toward the ground face first. I was so distracted by the girl I like in class that I tripped and took a nosedive right in front of her.
3. By extension, to suddenly and rapidly begin to decline in physical, emotional, or psychological health or stability; to suffer a sudden loss or decline in value or success. My father held out bravely in his fight against cancer, but I'm afraid he's taken a nosedive in the last couple of weeks. Shares in the company are taking a nosedive ever since news of the tax scandal went public.
See also: nosedive, take

go into a nosedive

 and take a nosedive 
1. Lit. [for an airplane] suddenly to dive toward the ground, nose first. It was a bad day for flying, and I was afraid we'd go into a nosedive. The small plane took a nosedive. The pilot was able to bring it out at the last minute, so the plane didn't crash.
2. . Fig. [for someone] to fall to the ground face first. She took a nosedive and injured her face.
3. . Fig. to go into a rapid emotional or financial decline, or a decline in health. Our profits took a nosedive last year. After he broke his hip, Mr. Brown's health went into a nosedive, and he never recovered.
See also: nosedive

nosedive

n. a great drop; a great decline. (see also take a nosedive.) This year our profits have taken a nosedive.

take a nosedive

tv. to collapse; to fail. The market took a nosedive again today.
See also: nosedive, take