Norwegian Bokmål

Noun

lydmur m ‎(definite singular lydmuren, indefinite plural lydmurer, definite plural lydmurene)

1. the sound barrier

References

• “lydmur” in The Bokmål Dictionary.

Norwegian Nynorsk

Etymology

From lyd +‎ mur

Alternative forms

• ljodmur

Noun

lydmur m ‎(definite singular lydmuren, indefinite plural lydmurar, definite plural lydmurane)

1. the sound barrier

References

• “lydmur” in The Nynorsk Dictionary.