1
- a machine, especially one powered by electricity or internal combustion, that supplies motive power for a vehicle or for some other device with moving parts发动机, 马达; 内燃机; 电动机。
1.2
- a source of power, energy, or motive force原动力：
hormones are the motor of the sexual functions.
激素是性功能的原动力。
attrib.
1
- chiefly. Brit. driven by a motor〈主英〉机动的。
1.1
- of or relating to motor vehicles（与）汽车（有关）的：
motor insurance.
汽车保险。
2
- giving, imparting, or producing motion or action原动的, 引起运动的：
demand is the principal motor force governing economic activity.
需求是支配经济活动的主要推动力。
2.1
- Physiology relating to muscular movement or the nerves activating it【生理】（与）肌肉运动（有关）的; （与）运动神经（有关）的：
the motor functions of each hand.
每只手的运动功能。
no obj., with adverbial of direction
1- informal, chiefly. Brit. travel in a motor vehicle, typically a car〈非正式, 主英〉乘机动车（尤指汽车）旅行：
they motored north up the M6.
他们乘车沿M6公路北上。
1.1
- with obj. and adverbial of direction convey (someone) somewhere in a motor vehicle用汽车运送（人）。
1.2
- informal run or move as fast as possible〈非正式〉尽快地跑; 尽快地移动。
词源
late Middle English (denoting a person who imparts motion)： from Latin， literally 'mover'， based on movere 'to move'. The current sense of the noun dates from the mid 19th cent.