General Science

  • verb to remove something which is in the way



  • adjective referring to conditions in which it is easy to see, e.g. with no cloud or fog
  • verb to remove a blockage or some other unwanted effect which prevents a system from working correctly
  • verb to make sure that it is all right to do something
  • verb to officially ask people to quickly leave a given area or place


  • adjective free, total
  • verb to sell something cheaply in order to get rid of stock


  • verb to wipe out or erase or set to zero a computer file or variable or section of memory
  • verb to release a communications link when transmissions have finished


  • The distance between any two points without interruptions, obstructions, or discontinuations, as in a clear span. See also clearance.


  • A market is said to clear if supply is equal to demand. market clearing can be brought about by adjustment of the price (or the exchange rate, in the case of the exchange market), or by some form of government (or central bank) intervention in or regulation of the market.


  • Easily seen or heard.
  • available for use.
  • To restore a storage element or storage location to its zero state. Also called reset (4).
  • To remove or delete instructions or data from a computer or calculator.
  • To remove all content from a display, such as mat of a computer.
  • A function key, such as that found on a calculator, used to delete the previous entry, a memory location, or everything.

Information & Library Science

  • verb to delete data from a computer display or storage device


  • verb to obtain a slot for broadcasting an advertisement


  • verb to take away a blockage


  • adjective free from hazards (such as chemical contamination, enemy troops, explosive devices, etc.)
  • noun an uncoded radio transmission
  • verb to unload a weapon


  • verb to remove dirty plates, cutlery and glasses from a surface such as a table

Origin & History of “clear”

Clear comes via Old French cler from Latin clārus (source also of English claret and clarion (14th c.)). It has been suggested that clārus is related to calāre ‘call out’ (whence English council). Latin derivatives that have come down to English are clārificāre, from which English gets clarify (14th c.), and clāritās, whence English clarity (16th c.). The middle English spelling of the adjective is preserved in clerestory ‘upper storey of a church’ (15th c.) (so named from its being ‘bright’ or ‘lighted’ with numerous windows).