English Dictionary

null

/nʌl/

adj

Having no validity; "null and void". / Insignificant. / Absent or non-existent. / (mathematics) Of the null set. / (mathematics) Of or comprising a value of precisely zero.

The expired coupon is null and void.

意味（1）

Having no validity; "null and void".

And however Firmilian and S. Cyprian might be deceived in the thinking hereticks quite loſt their orders ; yet in this they were untouched, that although their ſuppoſition was queſtionable, yet their ſuperſtructure was not meddled with, viz. That if they had been Lay-perſons, their Baptizations were null and invalid.

意味（2）

Insignificant.

In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.

意味（3）

Absent or non-existent.

意味（4）

(mathematics) Of the null set.

意味（5）

(mathematics) Of or comprising a value of precisely zero.

意味（6）

(genetics, of a mutation) Causing a complete loss of gene function; amorphic.

意味（7）

(mechanical engineering, of a position or setting) Neutral.

In normal operation, the input cranks to both the MPCU and standby rudder actuator will rotate to provide the servo valve command to the units, and the rudder will be hydraulically moved by the MPCU. The rudder movement is in turn fed back mechanically to both the MPCU and standby actuator systems so that when the rudder surface deflects to the position commanded by the pilot, the input cranks on both of the units will be returned to their null positions. Thus, there is a geometric relationship between the rudder position, the input crank of the MPCU, the torque tube, and the input crank of the standby rudder actuator that is retained during normal operation.