1. not achieving maximum productivity; wasting time, energy, or resources

Examples

• The old heating system was inefficient and costly to run.
• His inefficient work habits caused him to miss several deadlines.
• The company’s inefficient processes led to significant losses.
• She found the inefficient layout of the kitchen frustrating.
• The inefficient use of classroom time reduced learning opportunities.
• Traffic jams make driving an inefficient way to travel downtown.