1. the quality or state of being artificial; lack of naturalness or authenticity
Usage: uncountable noun; often used to describe behavior, speech, or manner that seems forced or insincere
2. the quality of being made or produced by human effort rather than occurring naturally
Usage: uncountable noun; used to describe materials, substances, or objects that are synthetic or manufactured

Examples

• The artificialness of her smile made it clear she was uncomfortable at the party.
• Critics complained about the artificialness of the dialogue in the film.
• The artificialness of the plastic flowers was obvious compared to the real roses.
• He spoke with such artificialness that nobody believed his apology.
• The artificialness of the flavoring gave the drink an unpleasant aftertaste.
• Despite the artificialness of the setting, the actors delivered convincing performances.