プログレッシブ和英中辞典(第4版)の解説
だんてい【断定】
〔推論の結果〕 ((come to; arrive at; draw)) a conclusion；〔判断，決定〕 ((arrive at; make; reach)) a decision
断定する conclude ((that; to do))；decide ((that))
断定を下す
draw a conclusion
性急に断定する
jump to conclusions
綿密に検討してこの断定を下した
We have come to this conclusion after making a careful investigation.
彼は信頼できない男だと断定せざるを得なかった
I 「could not help concluding [had to conclude] that he was not to be trusted.
犯人はその男だとまだはっきり断定されていない
It has not yet been determined [proved conclusively] that he is the criminal.
救助隊を出すには状況が危険だと断定した
We decided that conditions were too dangerous to send out a rescue party.