What does projectile mean?
A projectile is an object or substance that is propelled through space, usually by being thrown, fired, or launched. In everyday language, the word most often refers to a weapon such as a bullet, shell, or missile. In physics and engineering, it is used more broadly for any body given an initial velocity and then moving under forces such as gravity or air resistance. The word is especially common in discussions of projectile motion, trajectories, and weapons. It comes from Latin roots associated with throwing or sending forward, a history reflected in related words such as project and reject. Although the term can describe almost any propelled object, it commonly carries a technical or military tone and is less likely than “object” to describe something gently thrown.
nounAn object or substance propelled through space by an initial force, especially a missile, bullet, or similar weapon. The term is also used in physics for an object moving under gravity or another force.
- An object or substance propelled through space, especially a missile, bullet, shell, or other weapon.
- A body or object moving through space under the influence of gravity, thrust, or another force, especially in physics.
"The projectile was launched from a high-powered cannon and followed a steep trajectory."
"The aircraft was designed to carry the new projectile at high speed."
"In physics class, the students calculated the trajectory of the projectile."
The regular plural is used for individual objects propelled through space or for types of ammunition.
"The test launched several projectiles across the range."
From the Latin proicere, meaning “to throw forward,” a projectile is literally something thrown into motion.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does projectile come from?
The English word comes through French projectile, from Latin proiectus, the past participle of proicere, meaning “to throw forward.” The Latin prefix pro- indicates forward or onward, while iacere means “to throw” or “to cast.” Related English words derive from the same Latin tradition of projecting, rejecting, or throwing something forward.
Related word forms
How projectile is actually used
In general usage, “projectile” often suggests a weapon or munition. In physics and engineering, it has a broader technical meaning that includes any object launched with an initial velocity.
Easily confused with projectile
A projectile is an object that is launched or propelled, whereas a projector is a device that projects images, light, or sound.