from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An apparent change in the direction of an object, caused by a change in observational position that provides a new line of sight.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The change of angular position of two stationary points relative to each other as seen by an observer, due to the motion of an observer.
- n. The apparent shift of an object against a background due to a change in observer position.
- n. The angle of seeing of the astronomical unit.
from the GNU version of the Collaborative International Dictionary of English
- n. The apparent displacement, or difference of position, of an object, as seen from two different stations, or points of view.
- n. The apparent difference in position of a body (as the sun, or a star) as seen from some point on the earth's surface, and as seen from some other conventional point, as the earth's center or the sun.
- n. The annual parallax. See annual parallax, below.
from The Century Dictionary and Cyclopedia
- n. An apparent displacement of an object observed, due to real displacement of the observer, so that the direction of the former with reference to the latter is changed.
- n. In optics, an apparent shifting of the spider-lines in a telescope-reticle as the eye is moved before the eyepiece: it is due to the non-coincidence of the threads with the focal plane of the object-glass.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the apparent displacement of an object as seen from two different points that are not on a line with the object
French parallaxe, from Greek parallaxis, from parallassein, to change : para-, among; see para-1 + allassein, to exchange (from allos, other).(American Heritage® Dictionary of the English Language, Fourth Edition)