Philately is the study of stamps and postal history and other related items. It also refers to the collection, appreciation and research activities on stamps and other philatelic products. Philately involves more than just stamp collecting, which does not necessarily involve the study of stamps. It is possible to be a philatelist without owning any stamps. For instance, the stamps being studied may be very rare, or reside only in museums.

The word "philately" is the English version of the French word "philatélie", coined by Georges Herpin in 1864. Herpin stated that stamps had been collected and studied for the previous six or seven years and a better name was required for the new hobby than timbromanie, which was disliked. He took the Greek root word φιλ(ο)- phil(o)-, meaning "an attraction or affinity for something", and ἀτέhfλεια ateleia, meaning "exempt from duties and taxes" to form "philatelie". The introduction of postage stamps meant that the receipt of letters was now free of charge, whereas before stamps it was normal for postal charges to be paid by the recipient of a letter.

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