an estimation that is too low; an estimate that is less than the true or actual value
make too low an estimate of; "he underestimated the work that went into the renovation"; "Don't underestimate the danger of such a raft trip on this river"
the act of allowing; "He objected to the allowance of smoking in the dining room"
a permissible difference; allowing some freedom to move within limits
an amount added or deducted on the basis of qualifying circumstances; "an allowance for profit"
an amount allowed or granted (as during a given period); "travel allowance"; "my weekly allowance of two eggs"; "a child's allowance should not be too generous"