mindmap root((外部)) outer tends to retain its comparative force and apply to what is farther out from something described as inner: the ~ layer of skin is called the epidermis; or is farther than another thing from a center: shed one's ~ garments. outward commonly implies motion or direction away from, or the reverse of, what is inward: given to ~ display; or implies what is apparent, as opposed to what is within or is spiritual or mental: an ~ show of courage belied his inward terror. outside usually implies a position on or a reference to the outer parts or surface of a thing: a shutter covered the ~ of the window; it also tends to apply to what is beyond some implied limit: looked for caused in ~ influences. external close to outside in meaning, may be preferred when location beyond or away from the thing under consideration is implied: directed their attention to ~ affairs. exterior also close to outside, may be preferred when location on the surface or outer limits of the thing is implied: gave the ~ of the building a fresh coat of paint.