To hang across or beyond; be suspended over.
In molecular biology, an overhang can be in either strand of a DNA molecule. Thus, a 3' or 5' overhang may be produced. An overhang may only be a single unpaired nucleotide in the end of DNA or a longer stretch of unpaired nucleotides like in cohesive end.
Related forms: overhangs (verb: simple present), overhanging (verb: present participle), overhung (verb: past, past participle).