1 n. — Sports, also used attributively, e.g. five-pin tournament
a type of bowling played with five instead of ten pins (see Video, see Images 1 & 2).
Type: 1. Origin — Five-pin bowling was devised by Thomas F. (Tommy) Ryan at the Toronto Bowling Club in 1909 as a less strenuous version of the game using ten pins (see History of 5-pin bowling reference). The pins and the ball are smaller than those used in 10-pin bowling. Popularity increased quickly (see the 1914 and 1957 quotations), with the first Canadian championships held in 1953. Today, the game is offered at most bowling alleys across the country.
See also Gage-1, s.v. "fivepin", ITP Nelson, s.v. "fivepin", COD-2, s.v. "five-pin bowling", which is marked "Cdn".
- Often shortened to five-pin.
2 n. — Sports
five-pinner, someone who plays five-pin bowling.
Type: 1. Origin — See meaning 1.
Images:

Image 1: Five-pin bowling. Photo: Edmonton 5 Pin Bowlers’ Association (used by kind permission)
Image 2: Five-pin bowling for children. Note that the ball is usually played with only one hand like a 10-pin bowling ball (Adapted from Wikimedia Commons. Photo: D. Norman)