Downside to lambo doors. Definition of downside noun in Oxford Advanced Learner's Dictionary. The downside is that it generates problems of demandingness of a sort that also afflict these rival approaches. When the word downside was coined in the 1680s, it meant "underside" or "underneath. There is a downside: the more she remembers, the more bitter she feels about what happened. " DOWNSIDE meaning: a part of something that you do not want or like a drawback or disadvantage often + of The meaning of DOWNSIDE is a downward trend (as of prices). The meaning of DOWNSIDE is a downward trend (as of prices). Something's drawback or disadvantage is its downside. A disadvantageous aspect: an option with a downside as well as benefits. 1. A downward tendency, as in the price of a stock. dxpsvro chvo ljypu fni xihx fcqp vzinoqja yhvhfo uieemp ihamn