A group of words that contain a subject and a predicate and makes complete sense. The words communicate an understandable message and reveals a complete thought.
A group of words which begins with
- a capital letter
- ends with a full-stop (.)exclamation (!) or question mark (?)
from Fun To Teach ESL – Teaching English as a Second Language http://esleld.blogspot.com/2016/09/the-sentence.html