the state of having half missing. the state of being made up of two separate parts.

Is Halfness a word?

Meaning of "halfness" in the English dictionary

Halfness is a noun. A noun is a type of word the meaning of which determines reality.

Do something by halves meaning?

humorous. If someone does not do things by halves, they put a lot of effort and enthusiasm into doing things, often more than is necessary: "I didn't realize you were decorating the whole house." "Oh, we don't do things by halves round here."