image

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A representation of the form of a person or object, such as a painting or photograph.
• noun A sculptured likeness.
• noun Physics An optically formed duplicate, counterpart, or other representative reproduction of an object, especially an optical reproduction formed by a lens or mirror.
• noun One that closely or exactly resembles another.
• noun Likeness; semblance.
• noun The opinion or concept of something that is held by the public.
• noun The concept or character projected to the public, as by a person or institution, especially as interpreted by the mass media.
• noun A typical example or embodiment.
• noun A mental picture of something not real or present.
• noun A vivid description or representation in words, especially a metaphor or simile.
• noun Mathematics A set of values of a function corresponding to a particular subset of a domain.
• noun Computers An exact replica of the contents of a storage device, such as a hard disk, stored on a second storage device, such as a network server.
• noun Obsolete An apparition.
• transitive verb To make or produce a likeness of.
• transitive verb To mirror or reflect.
• transitive verb To make a visual representation of (an object) using remote scanning or technology such as magnetic resonance imaging.
• transitive verb To symbolize or typify.
• transitive verb To picture mentally; imagine or visualize.
• transitive verb To describe, especially so vividly as to evoke a mental picture.
• transitive verb To print (a file) using a laser printer, imagesetter, direct-to-plate press, or similar device.
• transitive verb To transmit (an exact replica of the contents of a storage device) to another storage device.

from The Century Dictionary.

• noun Images (as of a candle flame) reflected from the anterior and posterior surfaces of the crystalline lens and from the front of the cornea. The middle image (that from the anterior surface of the lens) varies in size and position as the eye is alternately accommodated for a farther and a nearer point.
• To form an image of; represent by an image; reflect the likeness of; mirror: as, mountains imaged in the peaceful lake.
• To present to the mental vision; exhibit a mental picture of; portray to the imagination.
• To form a likeness of in the mind; call up a mental image or perception of; imagine.
• To be like; resemble: as, he imaged his brother.
• noun A likeness or similitude of a person, animal, or thing; any representation of form or features, but more especially one of the entire figure, as by sculpture or modeling; a statue, effigy, bust, relief, intaglio, portrait, etc.: as, an image in stone, bronze, clay, or wax; a painted or stamped image; to worship idolatrous images.
• noun A natural similitude, reproduction, or counterpart; that which constitutes an essential representation, copy, or likeness: as, the child is the very image of its mother.
• noun A concrete mental object, not derived from direct perception, but the product of the imagination; a mental picture.
• noun Semblance; show; appearance; aspect.
• noun In rhetoric, a metaphor so expanded as to present a complete likeness or picture to the mind; a similitude wrought out by description; an illustrative comparison: as, a metaphor suggests a likeness, but an image paints it with a few verbal touches.
• noun An optical counterpart or appearance of an object, such as is produced by reflection from a mirror, refraction by a lens, or the passage of luminous rays through a small aperture. See vision, mirror, and lens.
• noun In mathematics, when imaginary quantities are represented by points on a plane, a point representing any given function of a quantity represented by another point, the former point is said to be the image of the latter.

from the GNU version of the Collaborative International Dictionary of English.

• noun An imitation, representation, or similitude of any person, thing, or act, sculptured, drawn, painted, or otherwise made perceptible to the sight; a visible presentation; a copy; a likeness; an effigy; a picture; a semblance.
• noun Hence: The likeness of anything to which worship is paid; an idol.
• noun Show; appearance; cast.
• noun A representation of anything to the mind; a picture drawn by the fancy; a conception; an idea.
• noun (Rhet.) A picture, example, or illustration, often taken from sensible objects, and used to illustrate a subject; usually, an extended metaphor.
• noun (Opt.) The figure or picture of any object formed at the focus of a lens or mirror, by rays of light from the several points of the object symmetrically refracted or reflected to corresponding points in such focus; this may be received on a screen, a photographic plate, or the retina of the eye, and viewed directly by the eye, or with an eyeglass, as in the telescope and microscope; the likeness of an object formed by reflection.
• noun See under Electrical.
• noun one who destroys images; an iconoclast.
• noun a sculptor.
• noun the worship of images as symbols; iconolatry distinguished from idolatry; the worship of images themselves.
• noun (Physics) the image of the retinal blood vessels projected in, not merely on, that membrane.