What is to commence, as a tone, on an unaccented part of a measure, and continue it into the following accented part, so that the accent is driven back upon the weak part and the rhythm drags called?

syncopate — (Mus.) To commence, as a tone, on an unaccented part of a measure, and continue it into the following accented part, so that the accent is driven back upon the weak part and the rhythm drags. (Webster's 1913.)