secretplan
nounUK /ˈsiː.krət plæn/
US /ˈsiː.krət plæn/
A plan you keep hidden so other people do not know about it.
The kids made a secret plan to surprise their teacher on her birthday.
OTHER MEANINGS
2. A plan kept hidden because it is meant to trick or catch someone.
The detective uncovered a secret plan to rob the museum.
3. A private idea for something fun that is shared only with close friends.
They whispered about their secret plan for the weekend trip.
4. A military or business plan that is not shared with the public.
The company kept its secret plan to launch a new toy under wraps.