Meaning of "reject the plan out of hand"

[Evgen]

Business Idiom in English, Intermediate level

ESL/EFL Test #138 "Ways of disagreeing", question 8

I regret I have no choice but to reject the plan out of ..........

(a) power
(b) court
(c) hand
(d) grip

Business Idiom in English, Intermediate level

ESL/EFL Test #138 "Ways of disagreeing", answer 8

I regret I have no choice but to reject the plan out of hand.

Correct answer: (c) hand
_________________________

What's the meaning of "reject the plan out of hand".
I've seen a number of similar expressions on newspapers but can't clearly understand the meaning.

Evgen

[Conchita]

'To reject the plan out of hand' means to refuse to accept it at once or without hesitation.

To get out of hand:
Inflation has got out of hand means that inflation is uncontrollable.