outer

adjective

/ˈaʊtə(r)/

/ˈaʊtər/

[only before noun]

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on the outside of something外表的；外边的 synonym external
- the outer layers of the skin皮肤表层
- While the chassis is made of steel, the outer shell is plastic. 而底盘是钢制的，外壳是塑料的。
- The attackers began to enter through the outer walls. 攻击者开始从外墙进入。
- The stair winds up between the inner and outer walls of the house.楼梯蜿蜒在房子的内墙和外墙之间。
furthest from the inside or centre of something远离中心的；外围的
- I walked along the outer edge of the track.我沿着跑道的外缘走。
- the outer suburbs of the city城市的远郊
- Outer London/Mongolia伦敦的外围地区；外蒙古
- (figurative) to explore the outer (= most extreme) limits of human experience探索人类经验的极限

opposite inner

Word Originlate Middle English: from out + -er, replacing earlier utter in its obsolete sense ‘outer’.

outer