/ap'li kay"sheuhn/, n.1. the act of putting to a special use or purpose: the application of common sense to a problem.2. the special use or purpose to which something is put: a technology having numerous applications never thought of by its inventors.3. the quality of being usable for a particular purpose or in a special way; relevance: This has no application to the case.4. the act of requesting.5. a written or spoken request or appeal for employment, admission, help, funds, etc.: to file an application for admission to a university.6. a form to be filled out by an applicant, as for a job or a driver's license.7. close attention; persistent effort: Application to one's studies is necessary.8. an act or instance of spreading on, rubbing in, or bringing into contact: the application of a compress to a wound; a second application of varnish.9. a salve, ointment, or the like, applied as a soothing or healing agent.10. Computers. a type of job or problem that lends itself to processing or solution by computer: Inventory control is a common business application.[1375-1425; late ME applicacio(u)n ( < MF) < L application- (s. of applicatio), equiv. to applicat(us) applied (ptp. of applicare to APPLY) + -ion- -ION]Syn. 1. utilization. 3. aptitude, suitability, pertinence. 4. solicitation, petition. 7. assiduity, industry, persistence, perseverance. See effort.
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