Pronunciation: ' str ā t- ' l ī n
Function: adjective
Date: 1843
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>