(requires, requiring, required)
Frequency: The word is one of the 1500 most common words in English.
1.
If you require something or if something is required, you need it or it is necessary. (FORMAL)
If you require further information, you should consult the registrar...
This isn't the kind of crisis that requires us to drop everything else...
Some of the materials required for this technique may be difficult to obtain.
VERB: V n, V n to-inf, V-ed
2.
If a law or rule requires you to do something, you have to do it. (FORMAL)
The rules also require employers to provide safety training...
At least 35 manufacturers have flouted a law requiring prompt reporting of such malfunctions...
The law now requires that parents serve on the committees that plan and evaluate school programs...
Then he'll know exactly what's required of him.
VERB: V n to-inf, V n, V that, be V-ed of n
3.
If you say that something is required reading for a particular group of people, you mean that you think it is essential for them to read it because it will give them information which they should have.
...an important research study that should be required reading for every member of the cabinet.
PHRASE: v-link PHR, oft PHR for n