What does impingement mean?
An impingement is the act of one thing striking or making contact with another. Its clearest application is technical: a particle impingement is a collision between a particle and a surface, while sound or radiation impingement describes waves or rays arriving at or striking an object. The word can also describe an interference with rights, boundaries, or another person's activities, especially in legal and property contexts. Impingement is more formal than impact and is often chosen when the physical contact or the precise technical process matters. It can carry a slightly forceful or consequential tone, suggesting that one thing meets or encroaches upon another rather than merely touching it. For general purposes, collision is usually more accessible, but impingement is valuable in scientific writing and in discussions of legal or spatial encroachment.
nounThe act of striking, colliding with, or coming into contact with something. In technical contexts, it can also refer to an interference or encroachment upon someone or something.
- The act of striking, colliding with, or coming into contact with something.
- An interference or encroachment upon a person, right, or boundary.
"The sensors detected the impingement of small particles on the protective surface."
"The impact of the debris caused damage to the outer panel."
"The court found that the extension constituted an impingement on the neighbouring property."
Plural form used when referring to multiple impacts, contacts, or encroachments.
"The instrument recorded several impingements during the test."
From particles striking a spacecraft shield to sound waves meeting a wall, impingement names the moment one thing makes contact with another.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does impingement come from?
The word comes from Latin impingere, meaning “to strike against,” formed from the prefix in- and the verb pingere, “to fix, fasten, or plant.” English borrowed impinge in the 17th century, and impingement was formed later by adding the suffix -ment to express an action or event. The related words impinge, impingly, and impingent preserve the same Latin verbal root.
How impingement is actually used
The word is formal and technical in scientific, engineering, legal, and property contexts. In general use, it is less common than impact or collision, while the sense of encroachment is chiefly associated with law and property rights.
Easily confused with impingement
An impediment is an obstacle that hinders progress, whereas an impingement is primarily a physical impact or, less commonly, an encroachment.