
n., An autonomous system that receives information from its environment, processes it, and performs actions on that
environment. Agents may have different degrees of intelligence or rationality, and may be implemented in software, hardware, or both. [Computer and Information Sciences] 
n., An agent is a business representative who handles contractual arrangements between the principal and third persons.
[Government] 
n., Information presented in dial form (with pointer and graduated markings) or in LCD bar