the continuous line forming the boundary of a closed geometrical figure
(几何图形的)周,周边
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the perimeter of a rectangle .矩形的四边。
the length of such a line
周长
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the rectangle has a perimeter of 30 cm .那矩形的周长是30厘米。
the outermost parts or boundary of an area or object
边缘,周边
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the perimeter of the garden 那花园的边缘
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figurative 〈喻〉my presence on the perimeter of his life .我在他生活中无足轻重的位置。
a defended boundary of a military position or base
(军事阵地或基地的)防线。
【篮球】 外围
an instrument for measuring the extent and characteristics of a person's field of vision
视野计。
"late Middle English: via Latin from Greek