1. in a stiff, inflexible manner; without bending or yielding
2. in a strict, unchanging manner; without deviation from rules or standards

Examples

• The soldier stood rigidly at attention during the ceremony.
• She held her back rigidly straight while walking across the stage.
• The school rigidly enforces its dress code policy.
• He rigidly follows the same morning routine every day.
• The metal bar was rigidly fixed to the wall.
• The company rigidly adheres to safety regulations.
• Her face remained rigidly expressionless during the interview.