Before
Before adverb - So as to precede something in order of time.
On and before are semantically related. In some cases you can use "On" instead the word "Before" as an adverb or a preposition.
On
On adverb - Toward or at a point lying in advance in space or time.
Usage example: he's getting on in years and doesn't see or hear as well as he used to
Before and on are semantically related. Sometimes you can use "Before" instead the word "On" as an adverb or a preposition.
Mutual synonyms
Cite this Source
On and Before. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/before/on
Before & On. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/before/on>.
On or Before. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/before/on.
Google Ngram Viewer shows how "before" and "on" have occurred on timeline