The definition of stray is someone or something that has been separated from where it should be or that is loose and all-by-itself.(adjective)
To stray is to deviate off course or to wander away from where you should be.(verb)
When you wander off course, this is an example of a time when you stray.
See stray in Webster's New World College Dictionary
Origin: ME straien < OFr estraier < estrée, road, street < LL strata, street
See stray in American Heritage Dictionary 4
intransitive verb strayed, stray·ing, strays
Origin: Middle English straien
Origin: , from Old French estraier
Origin: , from estree, highway
Origin: , from Latin strāta; see street.
Learn more about stray