Collins COBUILD Advanced Learner's English Dictionary - sincerely

1. If you say or feel something sincerely, you really mean or feel it, and are not pretending. ‘Congratulations,’ he said sincerely... ‘I sincerely hope we shall meet again’, he said... He sincerely believed he was acting in both women’s best interests. ADV: usu ADV with v, also ADV adj 2. In Britain, people write ‘Yours sincerely’ before their signature at the end of a formal letter when they have addressed it to someone by name. In the United States, people usually write ‘Sincerely yours’ or ‘Sincerely’ instead. Yours sincerely, James Brown. CONVENTION