proportional adjective 3noun 1forms 3 adjective3 •At a constant ratio (to). Two magnitudes (numbers) are said to be proportional if the second varies in a direct relation arithmetically to the first. Symbol: ∝.A vacuum-controlled straight air brake system is fitted, in which the driver's vacuum brake valve applies the train brake and makes a proportional application of the locomotive air brake. — 1958 •In proportion (to), proportionate.This ensures consistency across your website design so that you don't end up with elements that are not adequately proportional with each other. — 2014 •Of a typeface, having characters with natural (non-uniform) width (in contrast to monospace typefaces).A font is proportional if all characters in the font have different widths due to their various sizes. — 2013 noun1 •(no longer used) A proportion.It is almost superfluous to remark that the numbers attached to the elements of compounds are those of the proportionals in which they combine […] — 1828 formsproportionals · more proportional · most proportional
