one-word answer
noun phraseUK /wʌn wɜːd ˈɑːnsə/
US /wʌn wɜːrd ˈænsər/
A one-word answer is a reply that is just a single word.
When I asked if she was hungry, she gave a one-word answer: "Yes."
OTHER MEANINGS
2. A very short answer that may seem rude or unfriendly.
His one-word answer made it clear he did not want to talk.
3. An answer used in quick games or quizzes where only one word is allowed.
In the guessing game, each player must give a one-word answer.
4. A minimal response that gives information but no details.
The teacher wanted more, but all she got was a one-word answer.