one of several things that cause or influence something

a number that divides into another number exactly

1, 2, 3, 4, 6 and 12 are the factors of 12.

the amount by which something increases or decreases

The real wage of the average worker has increased by a factor of over ten in the last 70 years.

a particular level on a scale of measurement

a suntan lotion with a protection factor of 10

The wind-chill factor will make it seem colder.

a substance in the blood that helps the clotting process. There are several types of this substance.

Haemophiliacs have no factor 8 in their blood.

LEARNit Dictionary