tax-n; 2 Senses

Sense Number 1: taxation

Commentary: TAX[+quantity][+money][+levy][+government] revenue enhancement charge against a citizen's person or property or activity for the support of government

The President promised not to raise taxes.
In New Jersey there is no sales tax on food or clothing.
The IRS will fine you if you don't pay your taxes on time.

WordNet 3.0 Sense Numbers: 1

Sense Number 2: a heavy strain or burden

Commentary: TAX[+state][+situation][+burdensome]
NOTE: a figurative extension of sense 1

The children's constant interruption is a tax on her concentration.
The footnotes and commentary were a heavy tax on the reader's attention to the main text.

WordNet 0.0 Sense Numbers: 1b