| rat | move by degrees in one direction only, as of toothed wheels |
|---|---|
| rat | a screwdriver with a ratchet (so the blade turns in only one direction) and a spiral in the handle (so the blade rotates) with downward pressure on the handle |
| rat | toothed wheel held in place by a pawl or detent and turned by a lever |
| rat | the relative speed of progress or change |
| rat | amount of a charge or payment relative to some basis |
| rat | a magnitude or frequency relative to a time unit |
| rat | assign a rank or rating to |
| rat | estimate the value of |
| rat | be worthy of or have a certain rating |
| rat | (mechanics) the rate of change of velocity |
| rat | the rate of shrinkage in size or number |
| rat | the rate at which the value of property is reduced |