I don't remember what is the technical term for it, but "in a word", is just a descriptive phrase, not a sentence because it has no subject, object and a verb.

For the most part, "In a word" is followed by one word. It is generally used to summarize what you think about something. For example if someone asked you if you wanted to go to a certain restaurant you would say "I really hate that place, the food is bad and it's too expensive, so in a word, no"

"In a word..." is an expression we use in English to mean that we are describing something in as short a way as possible. Sometimes we emphasize a story by following it with this expression and a quick description. Some examples: 1. "Today my dog died, my grandmother's in the hospital, my fish jumped out of its tank, I lost my cell phone, and my computer crashed. In a word, I had a terrible day!" 2. – What are you so happy about? I want to know! – Well, in a word, I met a girl... 3. – What's important to know about values in American culture? – In a word, the American population is extremely polarized. Many Americans feel strongly one way, while most of the rest feel just as strongly about the opposite position.

in a word meas 总之，简言之 i dont know if i have answered ur question we often use In a word,...

Thanks EI'gabri. Thank you for your answer.