expansion joint
noun
a joint between two parts of a structure, machine, etc., permitting expansion, as from heat, without structural damage.
Origin of expansion joint
First recorded in 1840–50
Words nearby expansion joint
expansion bend,
expansion board,
expansion bolt,
expansion card,
expansion chamber,
expansion joint,
expansion slot,
expansion team,
expansion wave,
expansionary,
expansionism
British Dictionary definitions for expansion joint
expansion joint
noun
engineering
a gap in steel or concrete to allow for thermal expansion