one-shot

Adjective

• Needing only a single attempt to become effective.
• Unique; occurring only once.
• Performing all the necessary steps on every occurrence, rather than relying on previous setup.
• Measuring something at a single point in time, with no control group.
• Pertaining to a single shot.

Noun

• A television program, film, or comic book that is not part of a series.
• A cinematographic shot of a person talking to camera; a talking head.
• A monostable multivibrator.
• A programmable interval timer.
• Something that occurs only once; a one-off.
• A type of long-lasting paint.
• A music sample that is played without immediate repetition.
• A fanfic of only one chapter.
• A single appearance by a performer.
• A gun that must be reloaded after firing a single shot.
• A product that is sold on its own, rather than as part of a line of products.

Verb

• To kill or destroy with a single hit.