Etymology

pilaster

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Today it means: A rectangular column that projects partially from the wall to which it is attached; it gives the appearance of a support, but is only for decoration. Full definition →

Middle French pilastre ← Italian pilastro
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The story

  1. Italian · derived frompilastro
  2. Middle French · derived frompilastre
  3. English todaypilaster

From Middle French pilastre, from Italian pilastro. Equivalent to pillar + -aster.

Etymology from Wiktionary, CC BY-SA 4.0.