Learner's definition of ALLOWANCE
1 a : an amount of money that is given to someone regularly or for a specific purpose b chiefly US : a small amount of money that is regularly given to children by their parents
2 a : an amount of something (such as time) that is allowed or available b : an amount that is regarded as acceptable or desirable c : an amount that is subtracted from the price of something d British : an amount of your earnings that you do not have to pay taxes on 3 a [noncount] : the act of thinking about or including something when you make a plan, calculation, etc.
b : the act of regarding bad behavior or a mistake as less serious or bad because of some special situation or condition
When you're comparing costs from different decades, you need to make allowance for inflation. [=you need to allow for inflation]
His theory makes no allowance for [=does not allow for] the possibility that the disease may be genetic.
She performed poorly, but we should make some allowance for her inexperience. = Some allowance should be made for her inexperience. [=because she is inexperienced, we should not blame her too much for performing poorly]
4 [noncount], formal : the act of allowing something