noun
a close-fitting cover for something, especially something that is elongated in shape such as a sword or knife
-
The knight's sword was encased in a sturdy sheath.
-
She slid the knife back into its sheath on her belt.
-
He kept his gun in a sheath tucked into his waistband.
-
The lawyer used legal jargon as a sheath to hide the true meaning of his argument.