Low Gear Definition

noun
The low gear configuration of a transmission.
American Heritage
A state of minimum activity, energy, or force.
The project went into low gear during summer vacation.
American Heritage

The lowest gearing available from a gearbox, typically in a motor vehicle or cycle.

Wiktionary

One of the lower gearings available from a gearbox, typically in a motor vehicle or cycle.

Usage note: "low gear" implies the first sense, "a low gear" implies the second.
Wiktionary
Synonyms: