Extremely delicate, sensitive, or particular, especially in matters of taste or behavior; dainty, fussy, finicky, overnice: fastidious table manners; a fastidious dresser; a fastidious worker who agonizes over every detail of the job.
→Fastidious may also mean hard to please, extremely picky or demanding, exacting, critical to a fault: a fastidious ear for music; fastidious in one’s choice of friends; a fastidious client for whom a good job is never good enough.
Fastidious descends from Latin words meaning squeamish, disgusted, disdainful, and conceited. More than a trace of these unpleasant words remains in the way fastidious is used today. The fastidious person is so excessively concerned with details that he may become squeamish or disgusted if things are not just right. The fastidious person may also be so hard to please, so critical and demanding, that she appears contemptuous of others. According to the great Century Dictionary (1914), “Fastidious almost always means a somewhat proud or haughty particularity; a fastidious person is hard to please, because he objects to minute points or to some point in almost everything.”
Scrupulous, meticulous, punctilious, and fastidious all suggest demanding standards and careful attention to every aspect or detail.
Scrupulous (SKROO-pyuh-lus) means having scruples or principles; hence, rigorously careful and exact about doing what is correct and proper: “City officials called for a scrupulous investigation into the alleged embezzlement of public funds”; “All employees must follow company regulations scrupulously.”
Meticulous (muh-TIK-yuh-lus) is often used today to mean painstaking, taking pains to attend to details or exercise care, as in “The report showed meticulous research,” or “Doctors must wash their hands meticulously before examining patients.” Bear in mind, however, that meticulous comes through the Latin meticulosus, timid, from metus, fear, and by derivation properly suggests exaggerated attention to details or unimportant matters out of nervousness or timidity: “Albert dressed for the interview with meticulous care, all the while reminding himself that making a good first impression was the key to getting the job.”
Punctilious (puhngk-TIL-ee-us) comes from the Latin punctum, a point. From the same Latin punctum comes the English word punctilio (puhngk-TIL-ee-oh), a fine point, nice detail. By derivation, punctilious means exact and often excessive attention to punctilios, to fine points or minute details, especially in observing customs, ceremonies, or procedures: “The new executive director seemed to have Robert’s Rules of Order memorized, for she cited chapter and verse as she guided the board through each item on the agenda with a stern and punctilious hand.”
Fastidious means having extremely delicate, sensitive, or particular tastes; fussy, picky, or demanding in a condescending way. As Webster’s New International Dictionary, second edition (1934), puts it, fastidious suggests “a certain disdainfulness in rejecting what is displeasing to one’s taste.”