n.
1.a qualitative change
2.(mathematics) a function that changes the position or direction of the axes of a coordinate system
3.a rule describing the conversion of one syntactic structure into another related syntactic structure
4.(genetics) modification of a cell or bacterium by the uptake and incorporation of exogenous DNA
5.the act of changing in form or shape or appearance
Idiom of the Day
get up on the wrong side of the bed
to be in a bad mood
My friend got up on the wrong side of the bed this morning and will not talk to anyone.