1. The ordinal number of forty-three in counting order
   - 43rd

See also: ordinal

• operating expense
• operating instructions
• operating microscope
• operating procedure
• operating room
• operating statement
• operating surgeon
• operating system
• operating table
• operating theater
• operating theatre
• operation
• operation code
• Operation Desert Storm
• operational
• operational casualty
• operational cell
• operational damage
• operationalism
• operationalist
• operationally
• operations
• operations research
• operative
• operative field