ven chnce n. [an 〜] 五分五分の可能性[賭け] 〔of〕. ・It is an even chance that he will succeed. 彼の成功の見込みは五分五分だ. ・He stood an even chance of being elected. 五分五分ぐらいのところで当選しそうな形勢だった.