box frame

noun
  1. Architecture. a monolithic reinforced-concrete structure having walls and floors in the form of slabs.
  2. Building Trades. a window frame with pockets for sash weights.

Origin of box frame

First recorded in 1875–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for box frame

Historical Examples of box frame