'Roller skate' definitions:

Definition of 'roller skate'

noun

A shoe with pairs of rollers fixed to the sole

verb

Travel on shoes with steel or rubber rollers attached to their soles; "In some fashionable restaurants, the waiters roller skate around"

From: GCIDE

Roller skate \Roll"er skate\
1. a shoe with a set of wheels attached so that the wearer can glide over a flat surface. To move on such a device is reverred to as to skate or to rollerskate. To rollerskate is a form of recreation or sport. [PJC]
2. a metal frame of the size of a shoe, with a set of wheels attached, and with adjustable clamps and straps that permit a shoe to be reversibly fastened to the frame. It serves the same purpose as the roller skate having the shoe permanently attached, but is typically less expensive. [PJC]

From: GCIDE

10. (Zool.) Any species of small ground snakes of the family Tortricidae. [1913 Webster]
Ground roller (Zool.), any one of several species of Madagascar rollers belonging to Atelornis and allied genera. They are nocturnal birds, and feed on the ground.
Roller bolt, the bar in a carriage to which the traces are attached; a whiffletree. [Eng.]
Roller gin, a cotton gin inn which rolls are used for separating the seeds from the fiber.
Roller mill. See under Mill.
Roller skate, a skate which has small wheels in the place of the metallic runner; -- designed for use in skating upon a smooth, hard surface, other than ice. [1913 Webster]

From: GCIDE

Skate \Skate\ (sk[=a]t), n. [D. schaats. Cf. Scatches.] A metallic runner with a frame shaped to fit the sole of a shoe, -- made to be fastened under the foot, and used for moving rapidly on ice. [1913 Webster]
Batavia rushes forth; and as they sweep, On sounding skates, a thousand different ways, In circling poise, swift as the winds, along, The then gay land is maddened all to joy. --Thomson. [1913 Webster]
Roller skate. See under Roller. [1913 Webster]