1. a detailed description of design criteria for a piece of work
Usage: informal; short for specification
2. work done without a contract or commission in hopes of selling it
Usage: informal

1. to write specifications for something
Usage: informal

Examples

• The architect reviewed the building specs before starting construction.
• Make sure the computer meets all the technical specs.
• The writer worked on spec, hoping to sell the screenplay later.
• She painted the portrait on spec for the gallery.
• The engineer needs to spec out the new equipment requirements.
• Can you spec the materials needed for this project?
• The job specs were very detailed and specific.