lagging

Etymology
from lag

Adjective

 * 1) falling behind, not keeping up the pace
 * 2) Occurring after; indicating the later phase of

Noun

 * 1) The covering of something with strips of felt, wood etc, either as insulation or for protection.
 * 2) The material so used.
 * 3)  A prison sentence, originally one of at least three years.

Usage notes

 * Defined in various sources as a sentence of at least two, three, or five years' duration.

Translations

 * Czech: tepelná izolace
 * Greek: θερμομονωτικό υλικό