A furrow, channel, or long hollow, such as may be formed by cutting, molding, grinding, the wearing force of flowing water, or constant travel; a depressed way; a worn path; a rut.

To cut a groove or channel in; to form into channels or grooves; to furrow.

A U-shaped, square-cornered cut in the surface of a board that is cut with the grain of the wood (not across it). Used in joinery as well as for decorative purposes.

or sail slot A narrow channel running the length of the mast or boom into which a rope-reinforced edge of the mainsail is inserted and thus bent

A cut made with the grain of a board.

A small channel. A cut in material.

A recessed cut made across the grain of the wood. A groove has two straight sides that are at a 90 degree angle with a flat bottom. See also Plough.

a long narrow furrow cut either by a natural process (such as erosion) or by a tool (as e.g. a groove in a phonograph record)

(anatomy) any furrow or channel on a bodily structure or part

hollow out in the form of a furrow or groove; "furrow soil"

A recess cut into a board or panel, with the grain.

A long narrow channel.

A channel cut into a piece of wood that runs with the grain.

In wood strips with a tongue and groove joint, a tongue is milled on one edge of the strip and a groove is cut into the opposite edge. The form of the joint is also referred to as male (tongue) or female (groove). When the flooring is installed, the tongue of each strip is inserted into the groove of the adjacent strip.

The machined glandular recess into which the O-ring is fitted.

tong, narrow, hollow cut into surface.

In joinery, a groove is a slot or trench cut into a member which runs parallel to the grain. A groove is thus differentiated from a dado, which runs across the grain.