Dictionary.net

one who reveals confidential information in return for money

someone who works (or provides workers) during a strike

desert one's party or group of friends, for example, for one's personal advantage

give (hair) the appearance of being fuller by using a rat

a pad (usually made of hair) worn as part of a woman's coiffure

catch rats, especially with dogs

employ scabs or strike breakers in

one who reveals confidential information in return for money

someone who works (or provides workers) during a strike

desert one's party or group of friends, for example, for one's personal advantage

catch rats, esp. with dogs

give (hair) the appearance of being fuller by using a rat

employ scabs or strike breakers in (an industry)

One of several species of small rodents of the genus Mus and allied genera, larger than mice, that infest houses, stores, and ships, especially the Norway, or brown, rat (M. decumanus), the black rat (M. rattus), and the roof rat (M. Alexandrinus). These were introduced into America from the Old World.

A round and tapering mass of hair, or similar material, used by women to support the puffs and rolls of their natural hair.

One who deserts his party or associates; hence, in the trades, one who works for lower wages than those prescribed by a trades union.

In English politics, to desert one's party from interested motives; to forsake one's associates for one's own advantage; in the trades, to work for less wages, or on other conditions, than those established by a trades union.

To catch or kill rats.

One of several species of small rodents of the genus Mus and allied genera, larger than mice, that infest houses, stores, and ships, especially the Norway, or brown, rat (M. decumanus), the black rat (M. rattus), and the roof rat (M. Alexandrinus). These were introduced into America from the Old World.

A round and tapering mass of hair, or similar material, used by women to support the puffs and rolls of their natural hair.

One who deserts his party or associates; hence, in the trades, one who works for lower wages than those prescribed by a trades union.

In English politics, to desert one's party from interested motives; to forsake one's associates for one's own advantage; in the trades, to work for less wages, or on other conditions, than those established by a trades union.

To catch or kill rats.

The common name for the species Rattus norvegicus.

An animal somewhat like the mouse, but larger and more greedy.

To catch rats.

Ratter.

Ratted.

Ratting.

An animal of the mouse kind, but larger and more destructive.

To desert one's party and join their opponents for gain or power, as rats are said to leave a falling house:-pr.p. ratting: pa.t. and pa.p. ratted.

A small gnawing animal.

A rodent infesting houses, barns, ships, etc.

n. [Anglo-Saxon, German, French] One of several species of small rodent mammals, larger than mice, that infest houses, stores, and ships ;-one who deserts his party or associates;-hence, in the workshop or manufactory, one who works at less than the established prices, or engages while the hands are on strike.