Something incomplete is missing a part or unfinished. Incomplete things are not whole. A football pass that falls short is incomplete and so is an outfit without a shirt. A bridge to nowhere? Incomplete.
Incomplete describes things that are missing something. A chess set with a lost piece is incomplete. Incomplete also means “unfinished,” like that incomplete bridge to nowhere. People often feel their lives are incomplete until they do something like have a family or make a certain amount of money. You might get an incomplete grade for a class if your teacher is going to let you make up work you missed. When something's incomplete, part of that thing is missing or undone