Definition of apparatus

• pl. - of Apparatus
• n. - Things provided as means to some end.
• n. - Hence: A full collection or set of implements, or utensils, for a given duty, experimental or operative; any complex instrument or appliance, mechanical or chemical, for a specific action or operation; machinery; mechanism.
• n. - A collection of organs all of which unite in a common function; as, the respiratory apparatus.
• pl. - of Apparatus
• n. - Things provided as means to some end.
• n. - Hence: A full collection or set of implements, or utensils, for a given duty, experimental or operative; any complex instrument or appliance, mechanical or chemical, for a specific action or operation; machinery; mechanism.
• n. - A collection of organs all of which unite in a common function; as, the respiratory apparatus.