1. To form a line of arrested persons at police headquarters for inspection by officers and detectives; to take one's place in such a line. 2. To form, or take one's place in a line of suspects for identification by a complainant. 3. To form, or take one's place in a line of men for a series of criminal assaults on a woman. 4. To organize unions, or so-called "protective agencies" by force; to secure a list of potential victims of extortion, and to organize them into regularly paying groups. 5. To make all necesarry plans and preperations for the execution of a specific crime.

- american underworld dictionary - 1950