straggler

straggler is a Noun

Definition:

[1] One who straggles, or departs from the direct or proper course, or from the company to which he belongs; one who falls behind the rest; one who rambles without any settled direction.

[2] A roving vagabond. Shak.

[3] Something that shoots, or spreads out, beyond the rest, or too far; an exuberant growth. Let thy hand supply the pruning knife, And crop luxuriant stragglers. Dryden.

[4] Something that stands alone or by itself.