Conscientious is defined as acting in a way that is very
thorough and careful.(adjective) An example of conscientious is
measuring the liquid in each test tube of an experiment to be
perfectly equal. The definition of conscientious is following
what you know to be right or true.(adjective) An example of
conscientious is making a moral decision after lots of research
and consideration. See conscientious in Webster's New World
College Dictionary Origin: Fr conscientieux < ML conscientiosus:
see conscience & -ous See conscientious in American Heritage
Dictionary 4 Origin: Obsolete French conscientieux Origin: ,
from Medieval Latin cōnscientiōsus Origin: , from Latin
cōnscientia, conscience; see conscience. Learn more about
conscientious