a rapid automatic system to detect plastic explosives in passengers' luggage using X-ray technology and computers; designed for use in airports

A man who has charge of a door or gate; a doorkeeper; one who waits at the door to receive messages, A rope-carrier or supporter; a wheel or roller on a support used to sustain a traction- or transmission-rope and prevent its sagging and striking the ground between its terminal points, In the bowling industry, an employee who clears and cleans tables and puts bowling balls away, verb_ carry luggage or supplies

located above, especially over the head, ocated or originating from above, Of or relating to the operating expenses of a business, noun_ The operating expenses of a business, including the costs of rent, utilities, interior decoration, and taxes, exclusive of labor and materials, A compartment on a train, bus, or airplane used for storage of luggage or accessory equipment; called also overhead compartment, The image projected by an overhead projector, adverb_ Over or above the level of the head; high or higher up, a general term in manufactories for countershafting and gearing, when overhead, above one's head;in the sky

Anything to be carried that is cumbersome and heavy, The bags and other containers that hold a traveller's belongings, cases used to carry belongings when traveling