Clearance — Clear ance (kl[=e]r ans), n. 1. The act of clearing; as, to make a thorough clearance. [1913 Webster] 2. A certificate that a ship or vessel has been cleared at the customhouse; permission to sail. [1913 Webster] Every ship was subject to seizure … The Collaborative International Dictionary of English
clearance pocket compressor — Small space in a cylinder from which compressed gas is not completely expelled. This space is called the compressor clearance space or pocket. For effective operation, compressors are designed to have as small a clearance space as possible … Dictionary of automotive terms
clearance — [n1] permission for activity approval, authorization, consent, endorsement, goahead*, green light*, leave, okay, sanction, sayso*; concept 376 Ant. denial, grounding, refusal, veto clearance [n2] gap above something allowance, assart, defoliated… … New thesaurus
Space Shuttle orbiter — The Discovery orbiter approaches the ISS on STS 121 Operator NASA Mission type Orbiter … Wikipedia
clearance — 1560s, action of clearing, from CLEAR (Cf. clear) + ANCE (Cf. ance). Meaning a clear space is from 1788. Meaning approval, permission (esp. to land or take off an aircraft) is from 1944, Amer.Eng.; national security sense recorded from 1948.… … Etymology dictionary
clearance — [klir′əns] n. 1. an act or instance of clearing 2. the clear space or distance between moving objects or mechanical parts, or between a moving object and that which it passes through, over, under, etc. 3. official, esp. governmental,… … English World dictionary
clearance — ► NOUN 1) the action or an act of clearing or the process of being cleared. 2) official authorization for something to take place. 3) clear space allowed for a thing to move past or under another … English terms dictionary
clearance — n. act of clearing away 1) slum clearance authorization 2) to give; receive clearance for 3) customs clearance 4) clearance to + inf. (the control tower gave the pilot clearance to land) space between parts 5) valve clearance certification of… … Combinatory dictionary
clearance — clearer, n. /klear euhns/, n. 1. the act of clearing. 2. the distance between two objects; an amount of clear space: The bridge allowed a clearance of 37 feet at mean high water. 3. a formal authorization permitting access to classified… … Universalium
Clearance — A clearance can refer to: in chess, A positional move, where a player moves a piece occupying a certain square away, replacing it with an allied piece that will strengthen the player s position. in engineering and safety, a physical distance or… … Wikipedia
