To centralize or integrate different systems or forms into a single unified structure; to make things uniform

philosophy that the world is made of a single substance or principle, contrasted with [[多元论|多元論|duo1 yuan2 lun4]] or [[二元论|二元論|er4 yuan2 lun4]]

The start of a new year; out with the old and in with the new

An acid that can release only one hydrogen ion per molecule in an aqueous solution, such as hydrochloric acid or acetic acid

an alcohol containing one hydroxyl group per molecule

(literary) an ox used as a sacrifice in an ancestral temple; specifically, one that is fat with large feet and a wide gait

In mathematics, an algebraic equation that contains only one unknown or variable.