A prominent, overhanging belly. / Hence, a person with such a belly. / (medicine) A distended abdomen, especially caused by a tumour or enlarged organ; a physconia.

A person who overnights, or stays overnight. / Something that serves overnight travel, such as a night train. / (informal) A stay or event that takes place overnight.

plural of overreactivity

(pharmacology) A cure for otalgia.