■ verb
1》 be indecisive.
2》 Computing display or print (a colour image) without sharp edges so that it appears to contain extra colours.
■ noun informal
1》 a state of ~ing.
2》 a state of agitation.
Derivatives
~er noun
~y adjective
Origin
C17 (in the dialect sense 'tremble, quiver'): var. of dialect didder ; related to dodder 1 .