taking or showing extreme care about minute details; precise; thorough: a meticulous craftsman; meticulous personal appearance.
2.
finicky; fussy: meticulous adherence to technicalities.
Origin: 1525–35; < Latin metīculōsus full of fear, fearful, equivalent to metī- for metū- (stem of metus fear) + -culōsus, extracted from perīculōsusperilous