straight-line
adjective
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Definition of straight-line
1 : being a mechanical linkage or equivalent device designed to produce or copy motion in a straight line
2 : having the principal parts arranged in a straight line
3 : marked by a uniform spread and especially in equal segments over a given term straight-line amortization straight-line depreciation
4 : occurring, measured, or made in or along a straight line straight-line motion straight-line extrapolation
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