X factor
idiomAn unknown or hard-to-define influence; a factor with unknown or unforeseeable consequences.
- 01
factor in
To consider as a factor.
- 02
factor space
A space obtained from another by identification of points that are equivalent to one another in some equivalence relation.
- 03
fudge factor
A quantity introduced to compensate for uncertainty.
- 04
gut factor
The emotional dimension of decision-making. A person's subjective (often almost visceral) feelings about what is right or wrong, good or bad.