Definition

1. Adjective:

   • Extending as high as the knee: Describing something, especially a garment like a sock or boot, that reaches up to the level of a person's knee.
   • Very short or small: Used informally, often in similes, to describe someone or something as being very short in stature or young.

2. Noun:

   • A garment reaching the knee: A type of sock or stocking that is designed to extend to just below the knee.

Usage and Examples

• Adjective:

  • She wore knee-high leather boots in the winter. (The boots reached up to her knees.)
  • The grass was already knee-high by midsummer. (The grass had grown as tall as a person's knee.)
  • I've known him since he was knee-high to a grasshopper. (I've known him since he was very young and small.)

• Noun:

  • She pulled on a pair of woolen knee-highs. (She put on socks that came up to her knees.)
  • Fashion often cycles between ankle socks and knee-highs. (Knee-high socks are a recurring fashion trend.)

Advanced Usage and Nuances

• The phrase "knee-high to a grasshopper" (or "...to a mosquito/duck") is a fixed, humorous idiom used to emphasize that someone was very young or small at a past time.
  • My grandfather taught me to fish when I was knee-high to a grasshopper.
• As an adjective, it can describe non-garment items (e.g., plants, water) to indicate their height or depth relative to the knee.

Variants and Related Words

• Knee-highs (n., plural): The common plural form when referring to the socks or stockings.
• Knee-deep (adj.): Similar in structure but refers to depth (how deep something is) rather than height (how tall something is).
  • We waded through knee-deep mud. (The mud reached up to our knees.)

Synonyms

• Adjective (for garments): Over-the-calf, thigh-high (taller).
• Adjective (for height): Waist-high (taller), ankle-high (shorter).
• Idiom (for being young/small): Knee-high to a mosquito, just a tot, a wee lad/lass.

Idioms and Fixed Phrases

• Knee-high to a grasshopper/mosquito/duck: An idiom meaning very young or very small.
  • That old tree has been there since I was knee-high to a duck.

Noun

1. a sock or stocking that reaches up to just below the knees

Adverb

1. up to the knees
   • we were standing knee-deep in the water