(electronics, statistics) Initialism of root mean square. / (UK, nautical) Initialism of Royal Mail Ship. / (UK, nautical) Initialism of Royal Mail Steamship. / Initialism of rifle metallic silhouette.

Initialism of Railway Mail Service.

Initialism of ride me sideways.

plural of RM

Third-person singular simple present indicative form of RM

(historical) Initialism of reichsmark. / Initialism of Resident Magistrate. / (historical) Initialism of Roman month. / (typography) Initialism of right margin.

(Britain) Initialism of Royal Marines. / (Britain) Initialism of Royal Mail. / Initialism of Research Machines. / Initialism of Republic of Macedonia.

(computing, Unix) Abbreviation of remove.

Initialism of right margin. / (Mormonism) Initialism of returned missionary. / Abbreviation of room.

(computing, Unix, sometimes uppercase) Abbreviation of remove.