Student Thesaurus

One entry found for impermeable.
Entry Word: impermeable
Function: adjective
Text: 1 impossible to get through or into <the wall of security people surrounding the rock band was impermeable> -- see IMPENETRABLE 1
2 not allowing penetration (as by gas, liquid, or light) <an impermeable seal on the ancient tomb had preserved the artifacts exceptionally well> -- see TIGHT 1