The term 'IN CLOSE' can be solved by the four letter word 'SEAL'. A SEAL is a device or material that is used to close off an opening, often to prevent the passage of air, water, or other substances. Seals are commonly used in packaging, containers, and documents. They are also used in engineering and construction, such as in the sealing of pipes and valves. Seals are also used in law and government, such as in the sealing of official documents.