1) a rod or straight piece of rounded wood to which any thing is fastened to keep it straight

a) used for various purposes

1) a measuring rod, rule

2) a carpenter's line or measuring tape

3) the measure of a leap, as in the Olympic games

2) a definitely bounded or fixed space within the limits of which one's power of influence is confined

a) the province assigned one

b) one's sphere of activity

3) metaph. any rule or standard, a principle or law of investigating, judging, living, acting