- (written as Proportionality)Usually relates to the proportion of household or personal income that is taken in taxes; a proportional tax is one for which the proportion of income taken in tax is constant whatever the size of income. A regressive tax is one for which that proportion falls. A progressive tax is one for which it rises.
- noun the principle that a government or local authority can only act if the action is in proportion to the aim which is to be achieved, the aim being to protect the rights of ordinary citizens
- noun the principle that a legal action can only take place if the costs are proportionate to the aim to be achieved