move away aimlessly from a group or from the right course or place

dog owners are urged not to allow their dogs to stray

the military arrested anyone who strayed into the exclusion zone

not in the right place; separated from the group or target

he pushed a few stray hairs from her face

she was killed by a stray bullet

(of a physical quantity) arising as a consequence of the laws of physics, but unwanted and usually having a detrimental effect on the operation of equipment

stray capacitance

a stray person or thing, especially a domestic animal

electrical phenomena interfering with radio reception