1. a person born to parents who are not married to each other
Usage: archaic; sometimes offensive
2. an unpleasant or despicable person
Usage: informal; offensive

1. of irregular, inferior, or dubious origin
Usage: technical

Examples

• The historical records showed he was considered a bastard child.
• That bastard cut me off in traffic without signaling.
• The bastard version of the software had several bugs.
• She called him a complete bastard after he broke his promise.
• The plant was a bastard variety that didn’t breed true.
• The bastard copy of the painting fooled many experts.
• He’s such a bastard for lying about the accident.