What does nonplussed mean?
Nonplussed describes a person who is momentarily at a loss for words because of surprise, confusion, embarrassment, or another unexpected development. It is more expressive than simply saying that someone is puzzled: the person may be so taken aback that no response comes readily, or may fall conspicuously silent. Typical expressions include being nonplussed by a question, appearing nonplussed, or being left completely nonplussed. Although it can describe profound confusion, it usually implies a temporary reaction to something unexpected rather than a sustained inability to understand. The word is used in ordinary British and American English, though it has a somewhat literary or formal tone. Its vivid construction has made it especially effective in journalism, narrative prose, and descriptions of startled reactions.
adjectiveUnable to find words to speak in response to surprise, confusion, or an unexpected situation; momentarily speechless or discomposed.
- Temporarily unable to speak or respond because of surprise, confusion, embarrassment, or an unexpected development.
"The guest was so nonplussed by the sudden change of plan that he simply stared in silence."
"She was completely nonplussed by the question and could offer no explanation."
"The officials looked nonplussed when the machine began issuing tickets on its own."
Nonplussed combines “non-” with “plussed,” a vivid way to describe the moment when surprise leaves you with absolutely no words.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does nonplussed come from?
The word is formed by combining the negative prefix non- with plussed, as in plussed, meaning to be at a loss for words. Both elements ultimately relate to the idea of having more than one needs or being in a stronger position. The resulting expression developed as a humorous but expressive way to describe someone rendered speechless by surprise or confusion.
How nonplussed is actually used
The word is formal in register but widely understood. It often suggests a stronger, more vivid reaction than merely being confused or puzzled, particularly when someone is briefly rendered speechless.
Easily confused with nonplussed
Both words can express speechlessness, but nonplussed is the standard modern form, whereas unplussed is a less common alternative with the same general meaning.