Definition of realisation

• a musical composition that has been completed or enriched by someone other than the composer
• coming to understand something clearly and distinctly; "a growing realization of the risk involved"; "a sudden recognition of the problem he faced"; "increasing recognition that diabetes frequently coexists with other chronic diseases"
• a sale in order to obtain money (as a sale of stock or a sale of the estate of a bankrupt person) or the money so obtained