Look up activity in Wiktionary, the free dictionary.

Activity may mean:

• Action (philosophy), in general
• The Aristotelian concept of energeia, Latinized as actus
• Physical exercise
• Activity (UML), a major task in Unified Modeling Language
• Activity diagram, a diagram representing activities in Unified Modeling Language
• Activity, an alternative name for the game charades
• Activity, the rate of catalytic activity, such as enzyme activity (enzyme assay), in physical chemistry and enzymology
• Activity (chemistry), the effective concentration of a solute for the purposes of mass action
• Activity (project management)
• Activity (radioactivity), radioactive decay#Radioactive decay rates, the number of radioactive decays per second
• Activity (software engineering)
• Activity (soil mechanics)
• HMS Activity (D94), an aircraft carrier of the Royal Navy
• in military parlance, a military agency or unit (e.g. Intelligence Support Activity)
• Activity Theory, social constructivism (learning theory), Education

The special spelling Activiti may mean:

• Activiti, an open source Business Process Management (BPM) Platform

See also[link]

• Active (disambiguation)

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