'Knee-high' definitions:

Definition of 'knee-high'

(from WordNet)
adverb
Up to the knees; "we were standing knee-deep in the water" [syn: knee-deep, knee-high]
noun
A sock or stocking that reaches up to just below the knees [syn: knee-high, knee-hi]

Definition of 'Knee-high'

From: GCIDE
  • Knee-high \Knee"-high`\, a. Rising or reaching upward to the knees; as, the water is knee-high. [1913 Webster]