“stray” – English explanatory dictionary

noun an animal which is lost and far away from home ○ We have two female cats at home and they attract all the strays in the district. ■ adj 1. not where it should be ○ He was killed by a stray bullet from a sniper. 2. which is lost or without a home ○ We found a stray cat and brought it home. ■ verb to move away from the place where it should be ○ The sheep strayed onto the golf course. ○ The children had strayed too far and couldn’t get back.

v. i. [imp. & p. p. Strayed p. pr. & vb. n. Straying.] [OF. estraier, estraer, to stray, or as adj., stray, fr. (assumed) L. stratarius roving the streets, fr. L. strata (sc. via) a paved road. See Street, and Stray, a.]
1. To wander, as from a direct course; to deviate, or go out of the way. “Thames among the wanton valleys strays.” Denham.
2. To wander from company, or from the proper limits; to rove at large; to roam; to go astray. “Now, until the break of day,
Through this house each fairy stray.” Shak. “A sheep doth very often stray.” Shak.
3. Figuratively, to wander from the path of duty or rectitude; to err. “We have erred and strayed from thy ways.” of Com. Prayer. “While meaner things, whom instinct leads,
Are rarely known to stray.” Cowper. Syn. — To deviate; err; swerve; rove; roam; wander.

v. t. To cause to stray. [Obs.] Shak.

a. [Cf. OF. estraie, p. p. of estraier. See Stray, v. i., and cf. Astray, Estray.] Having gone astray; strayed; wandering; as a strayhorse or sheep. Stray line (Naut.), that portion of the log line which is veered from the reel to allow the chip to get clear of the stern eddies before the glass is turned. — Stray mark (Naut.), the mark indicating the end of the stray line.

n. 1. Any domestic animal that has an inclosure, or its proper place and company, and wanders at large, or is lost; an estray. Used also figuratively. “Seeing him wander about, I took him up for a stray.” Dryden.
2. The act of wandering or going astray. [R.] Shak.