(law) An indefeasible right or title, distinguished from a contingent interest, which could be defeated (i.e. cease) if a certain event occurred.

(finance) The schedule setting forth when and to what extent options become exercisable (for example, 20% per year over five years); could apply to restricted or deferred stocks also.

(finance) The date on which stock award restrictions lapse and the stock becomes available for transfer to buyer. Also the date on which stock options become available for exercise.

(historical) A decorative or identifying cover worn over chain mail or other armour by a medieval knight.

A close-fitting garment often worn while surfing or during other water sports under a wetsuit to prevent chafing and provide UV protection and in some cases extra warmth.

Small enough to be carried in a vest pocket or other small container. / (by extension) Smaller than would ordinarily be expected.

Any military or outdoor-themed vest commonly used by civilians.

(firearms) A handgun or cartridge that can fully penetrate a contemporary bulletproof vest.

plural of vest buster

A vest packed with explosives and armed with a detonator, worn by suicide bombers.