I.down1[美 daʊn, 英 daʊn]副down often appears as the second element of certain verb structures in English (back down, clamp down, tone down, etc). For translations, see the relevant verb entry (back, clamp, tone, etc).
In many countries, courts have the power of judicial review, which allows them to strike down any legislative or executive action that they find in violation of the nation's constitution.