Meaning of 違い無い in Japanese

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Definition of 違い無い

ちがいない(chigainai) 【違いない ·違い無い】

まちがいない(machigainai) 【間違いない ·間違い無い】

(exp, adj-i) certain; sure; doubtless →Related words: 紛れもない
それは間違いなく空飛ぶ円盤だったのだ。
It was a flying saucer all right.
(exp) I have no doubt; You can depend on it; It's a safe bet