/ staɪ; NAmE / noun
1.
( pl. sties ) = pigsty
2.
(also stye ) ( pl. sties or styes ) an infection of the eyelid (= the skin above or below the eye) which makes it red and sore
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WORD ORIGIN
sense 1 Old English stī- (in stīfearh sty pig ), probably identical with stig hall (see steward ), of Germanic origin.
sense 2 early 17th cent.: from dialect styany , from styan (from Old English stīgend riser ) + eye .