intransitive verb
Definition: To lower or let something down, often used in a formal or poetic context.
Example: As the sun began to set, the curtain of night started to vail the landscape.
noun
Definition: A word that is an old or less common form of another word that means a piece of cloth worn to cover the face or head.
Example: In historical contexts, a vail was often used by women to cover their faces in public.
transitive verb
Definition: To lower something, such as a banner or a flag, often as a sign of respect or submission.
Example: During the ceremony, they will vail the flag as a tribute.