clearance
UK: ˈklɪərəns | US: ˈklɪrəns
n. the act or process of clearing or removing obstacles
n. official authorization or approval (e.g., security clearance)
n. the space or distance between two objects to avoid contact
The word "clearance" originates from the Middle English "cleren," derived from Old French "cler," meaning "clear" or "bright." The suffix "-ance" was added to form a noun denoting the state or action of clearing. Historically, it evolved from literal meanings (e.g., clearing land) to metaphorical uses (e.g., bureaucratic approval). The logic reflects a progression from physical unobstructed space to abstract permissions.
The pilot waited for clearance before taking off.
The store is having a clearance sale to remove old stock.
Ensure there is enough clearance between the car and the garage door.
She obtained security clearance to access classified files.
The bridge has a low clearance, so tall trucks must detour.