Definition of "pinhole" [pinhole]

• A tiny puncture made by or as if by a pin. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The interesting thing about this system is it started off with what we call a pinhole eye -- very, very tiny eye, no more than four, five miles in diameter."
• "The hole the size of a pin, leads to the name pinhole photography and has been used by schools to show how photography works for years, but also be enthusiasts who like the style of pictures this form of photography creates."
• "He has an infectious way of sharing his interests in pinhole photography, weird Asian kiddie toys, kitschy ’70s music, and other stuff."