Strip

Three or more unseparated stamps in a row, vertically or horizontally.

Popularity: 1% [?]

Straight edge

Flat-plate or rotary-plate stamps from the margins of panes where the sheets were cut apart. Straight-edge stamps have no perforations on one or two adjacent sides. Sometimes straight-edge stamps show a guideline.

Popularity: 1% [?]

Stock book

A specially manufactured blank book containing rows of pockets on each page to hold stamps.

Popularity: 1% [?]

Stampless cover

A folded sheet or envelope carried as mail without a postage stamp. This term usually refers to covers predating the requirement that stamps be affixed to all letters (in the United States, 1856).

Popularity: 1% [?]

Stamp

An officially issued postage label, often adhesive, attesting that payment has been rendered for mail delivery. Initially used as a verb, meaning to imprint or impress; as in, to stamp a design.

Popularity: 1% [?]

Splice

The repair of a break in a roll of stamp paper, or the joining of two rolls of paper for continuous printing. Stamps printed over a splice are usually removed and destroyed before the normal stamps are issued.

Popularity: 1% [?]

Speculative issue

A stamp or issue released primarily for sale to collectors, rather than to meet any legitimate postal need.

Popularity: 1% [?]

Specimen

Stamp or stationery item distributed to Universal Postal Union members for identification purposes and to the philatelic press and trade for publicity purposes. Specimens are overprinted or punched with the word “”SPECIMEN” or its equivalent, or are overprinted or punched in a way to make them different from the issued stamps. Specimens of scarce stamps tend to be less valuable than the actual stamps. Specimens of relatively common stamps are more valuable.

Popularity: 1% [?]

Special stamps

Regular postage stamp issues that fall outside the traditional definitions of commemorative and definitive stamps. In the United States, holiday issues such as Contemporary Christmas, Traditional Christmas, Hanukkah and the like are considered special stamps. They are printed in substantially greater quantities than commemorative stamps, and sometimes return to press for additional printings. Love stamps are also considered special stamps.

Popularity: 1% [?]

Special printing

Reissue of a stamp of current or recent design, often with distinctive color, paper or perforations.

Popularity: 1% [?]