American Heritage® Dictionary of the English Language, Fourth Edition
- n. The high gear configuration of a transmission.
- n. Informal A state of maximum activity, energy, or force: Her mind was in high gear while studying for the art history examination.
- n. a forward gear with a gear ratio that gives the greatest vehicle velocity for a given engine speed
“At nine-forty-five A.M., they were about to go into high gear when my mom’s cell phone rang.”
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