usability.

Fitness for use by relevant users in achieving a purpose without undue difficulty or barriers.

Use it for

Words that belong together

• system usability
• usability of a document

On the page

System usability depended on the tasks and knowledge of the users being studied.

The document’s usability improved when the sequence and terminology were made clear.

Usage notes

Primary category: academic / formal. Forms: Usually uncountable. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Writing functions: criterion analysis, relative importance, potential and actual distinction, evidence interpretation. Disciplines: academic writing, institutional analysis, research and conceptual explanation. Commonness: moderately common.