A philistine is a full-grown person whose interests are of a material and commonplace nature, and whose mentality is formed of the stock ideas and co… - Vladimir Nabokov

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A philistine is a full-grown person whose interests are of a material and commonplace nature, and whose mentality is formed of the stock ideas and conventional ideals of his or her group and time. I have said "full-grown person" because the child or the adolescent who may look like a small philistine is only a small parrot mimicking the ways of confirmed vulgarians, and it is easier to be a parrot than to be a white heron. "Vulgarian" is more or less synonymous with "philistine": the stress in a vulgarian is not so much on the conventionalism of a philistine as on the vulgarity of some of his conventional notions. I may also use the terms genteel and bourgeois. Genteel implies the lace-curtain refined vulgarity which is worse than simple coarseness. To burp in company may be rude, but to say "excuse me" after a burp is genteel and thus worse than vulgar. The term bourgeois I use following Flaubert, not Marx. Bourgeois in Flaubert's sense is a state of mind, not a state of pocket. A bourgeois is a smug philistine, a dignified vulgarian.