Emily Dickinson Lexicon

SQUINT, a. [D. schuin, sloping, oblique; schuinte, a slope; W. ysgeiniaw, to spread, to sprinkle, to squint, from ysgain, to spread, to sprinkle. We see the sense is to deviate from a direct line, to wander or shoot off.]

1. Looking obliquely.
2. Optic axes of both eyes not coinciding; occasioned by a permanent shortening of one of the lateral recti muscles, and a permanent elongation of its antagonist.
3. Looking with suspicion. – Spenser.