'Insole' definitions:

Definition of 'insole'

From: WordNet
noun
The inner sole of a shoe or boot where the foot rests [syn: insole, innersole]

Definition of 'Insole'

From: GCIDE
  • Insole \In"sole`\, n. The inside sole of a boot or shoe; also, a loose, thin strip of leather, felt, etc., placed inside the shoe for warmth or ease. [1913 Webster]