### Question
What is the definition of aircraft?


### Answer
The definition of **aircraft** is as follows in *18 U.S.C. § 31*:

> a civil, military, or public contrivance invented, used, or designed to navigate, fly, or travel in the air

#### Citation:
  - *18 U.S.C. § 31*
  - Heading: **PART I-CRIMES > CHAPTER 2-AIRCRAFT AND MOTOR VEHICLES**

