Longman Dictionary English From Longman Dictionary of Contemporary English(I’m) much obliged (to you)(I’m) much obliged (to you)spoken old-fashionedTHANK used to thank someone very politely → obligeExamples from the Corpus(I’m) much obliged (to you)• Madam Deputy Speaker: I am much obliged to the hon. Gentleman. ldoceonline.com
