Mechanical/məˈkænɪkl/ Definition 1 of 3Pro Tip 1/3Technical Fields Used often in engineering or industry-related conversations, where precision is important. She specializes in mechanical design. Pro Tip 2/3Possible Confusion 'Mechanical' is about how things work, not electronic or computer-controlled systems. A mechanical watch operates without batteries. Pro Tip 3/3Physical Interaction Implies involvement with physical mechanisms, gears, or moving parts. Her invention featured a complex mechanical mechanism.