Definition of plunge into
1
: to push (something) into (something) quickly and forcefully
- He plunged the knife into the cake.
- I plunged the sponge into the bucket of water.
2
: to start doing (something) with enthusiasm and energy
- She plunged (right) into the assignment.
3
: to suddenly begin to be in (a particular and usually bad condition or situation)
- He plunged into a severe depression.
4
: to cause (someone or something) to suddenly be in (a particular condition or situation)
- A series of bad management decisions had plunged the company into debt.
- The author plunges his readers into a world of fantasy.
