1) Flight training equipment 2) Laboratory device 3) Machine 
• (n.) One who simulates, or feigns.
A device that mimics the operational conditions of equipment or vehicles.
An apparatus designed to produce effects simulating those of specific environmental conditions; used in experimentation and training. ... (05 Mar 2000) ... 
(sim″u-la´tәr) something that simulates, such as an apparatus that simulates conditions that will be encountered in real life.
Sim'u·la`tor noun [ Latin ] One who simulates, or feigns. De Quincey. 
A device, computer program or system used during testing, which behaves or operates like a given system when provided with a set of controlled inputs. [After IEEE 610, DO178b] See also emulator....
Type: Term Pronunciation: sim′yū-lā′tŏr, tōr Definitions: 1. An apparatus designed to produce effects simulating those of specific environmental conditions; used in experimentation and training.
[n] - a machine that simulates an environment for the purpose of training or research
Specialised X-ray machine used to plan radiotherapy treatment.
noun a machine that simulates an environment for the purpose of training or research