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The correction of observations for known errors of instruments, etc.

That which refers to something; a specific direction of the attention; as, a reference in a text-book.

The act of reforming, or the state of being reformed; change from worse to better; correction or amendment of life, manners, or of anything vicious or corrupt; as, the reformation of manners; reformation of the age; reformation of abuses. Satire lashes vice into reformation. Dryden.

The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a different density from that through which it has previously moved. Refraction out of the rarer medium into the denser, is made towards the perpendicular. Sir I. Newton.

scribed for management or government; prescription; a regulating principle; a governing direction; precept; law; as, the regulations of a society or a school. Regulation sword, cap, uniform, etc. (Mil.), a sword, cap, uniform, etc., of the kind or quality prescribed by the official regulations.

the reversal of the natural direction in which the current or contents flow through a tube or cavity of the body. Quain.

To pace again; to walk over again in a contrary direction.

To pass again; to pass or travel over in the opposite direction; to pass a second time; as, to repass a bridge or a river; to repass the sea.

An account or statement of the results of examination or inquiry made by request or direction; relation. "From Thetis sent as spies to make report." Waller.

ech.), the separation of a single force or motion into two or more which have different directions, and, taken together, are an equivalent for the single one; -- the opposite of Ant: composition of a force. -- Resolution of a nebula (Astron.), the exhibition of it to the eye by a telescope of such power as to show it…

The act of rising again; resurrection.

To go back, in or over (a previous course); to go over again in a reverse direction; as, to retrace one's steps; to retrace one's proceedings.

To go in a retrograde direction; to move, or appear to move, backward, as a planet.

The continuation in a different direction, most often at a right angle, of a building, face of a building, or any member, as a molding or mold; -- applied to the shorter in contradistinction to the longer; thus, a facade of sixty feet east and west has a return of twenty feet north and south.

The act of reversing; the causing to move or face in an opposite direction, or to stand or lie in an inverted position; as, the reversal of a rotating wheel; the reversal of objects by a convex lens.

Turned backward; having a contrary or opposite direction; hence; opposite or contrary in kind; as, the reverse order or method. "A vice reverse unto this." Gower.

aid of fabrics. Reversible lock, a lock that may be applied to a door opening in either direction, or hinged to either jamb. -- Reversible process. See under Process.

steam engine having a reversing gear by means of which it can be made to run in either direction at will. -- Reversing gear (Mach.), gear for reversing the direction of rotation at will.

Turned back; reversed. Specifically: (Her.) Bent or curved twice, in opposite directions, or in the form of an S.

The act of revising, or reviewing and reëxamining for correction and improvement; revision; as, the revisal of a manuscript; the revisal of a proof sheet; the revisal of a treaty.