From Longman Dictionary of Contemporary EnglishI think notI think notformal used to say that you strongly believe something is not true or that you disagree with someone This could be a coincidence, but I think not. → think
Examples from the Corpus
I think not• As to any woman being suitable for Ana's needs, I think not.• Is there something about me that attracts sexually abused women? I think not.• Perhaps he greets all ladies as he greeted me, but I think not.• Reagan, tight-lipped, replied, I think not.• So will closing these hospitals improve acute care? I think not.• The last nagging question is would we be so obsessed with the Simpson case if Nicole were black? I think not.• Unless they have been locked away for the past two years, I think not.• Could I have been dreaming? I think not as four other unsolicited accounts verified my experience. 