any of numerous predaceous arachnids of the order Araneae, most of which spin webs that serve as nests and as traps for prey.
(loosely) any of various other arachnids resembling or suggesting these.
any of various things resembling or suggesting a spider.
a frying pan, originally one with legs or feet.
a trivet or tripod, as for supporting a pot or pan on a hearth.
a part having a number of radiating spokes or arms, usually not connected at their outer ends.
Also called cross. (in a universal joint) a crosslike part pivoted between the forked ends of two shafts to transmit motion between them.
Digital Technology. web crawler.
an evil person who entraps or lures others by wiles.
a device attached to a cultivator, for pulverizing the soil.

before 1150; Middle English spithre, Old English spīthra, akin to spinnan to spin; cognate with Danish spinder

spiderless, adjective
spiderlike, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To spider
World English Dictionary
spider (ˈspaɪdə)
1.  wolf spider trap-door spider tarantula See also black widow any predatory silk-producing arachnid of the order Araneae, having four pairs of legs and a rounded unsegmented body consisting of abdomen and cephalothorax
2.  any of various similar or related arachnids
3.  a hub fitted with radiating spokes or arms that serve to transmit power or support a load
4.  agriculture an instrument used with a cultivator to pulverize soil
5.  any implement or tool having the shape of a spider
6.  nautical a metal frame fitted at the base of a mast to which halyards are tied when not in use
7.  any part of a machine having a number of radiating spokes, tines, or arms
8.  (Brit) Also called: octopus a cluster of elastic straps fastened at a central point and used to hold a load on a car rack, motorcycle, etc
9.  billiards, snooker a rest having long legs, used to raise the cue above the level of the height of the ball
10.  angling an artificial fly tied with a hackle and no wings, perhaps originally thought to imitate a spider
11.  computing a computer program that is capable of performing sophisticated recursive searches on the internet
12.  short for spider phaeton
[Old English spīthra; related to Danish spinder, German Spinne; see spin]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Word Origin & History

O.E. spiþra, from P.Gmc. *spenthro (cf. Dan. spinder), from *spenwanan "to spin" (see spin). The connection with the root is more transparent in other Gmc. cognates (cf. M.L.G., M.Du., M.H.G., Ger. spinne, Du. spin "spider"). In literature, often a figure of cunning,
skill, and industry as well as poisonous predation. As the name for a type of two-pack solitaire, it is attested from 1890. Another O.E. word for the creature was gangewifre "a weaver as he goes." Spiderweb is first recorded 1535; spidery is first recorded 1825. Spider plant is from 1852; spider crab is from 1710; spider monkey is from 1764, so called for its long limbs.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
American Heritage
Medical Dictionary

spider spi·der (spī'dər)

  1. Any of numerous arachnids of the order Araneae, having a body divided into a cephalothorax bearing eight legs, two poison fangs, and two feelers and an unsegmented abdomen bearing several spinnerets that produce the silk used to make nests, cocoons, or webs for trapping insects.

  2. An arterial spider.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Computing Dictionary

spider definition

World-Wide Web
(Or "robot", "crawler") A program that automatically explores the World-Wide Web by retrieving a document and recursively retrieving some or all the documents that are referenced in it. This is in contrast with a normal web browser operated by a human that doesn't automatically follow links other than inline images and URL redirection.
The algorithm used to pick which references to follow strongly depends on the program's purpose. Index-building spiders usually retrieve a significant proportion of the references. The other extreme is spiders that try to validate the references in a set of documents; these usually do not retrieve any of the links apart from redirections.
The standard for robot exclusion is designed to avoid some problems with spiders.
Early examples were Lycos and WebCrawler.
Home (http://info.webcrawler.com/mak/projects/robots/robots.html).
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
Cite This Source
Bible Dictionary

Spider definition

The trust of the hypocrite is compared to the spider's web or house (Job 8:14). It is said of the wicked by Isaiah that they "weave the spider's web" (59:5), i.e., their works and designs are, like the spider's web, vain and useless. The Hebrew word here used is _'akkabish_, "a swift weaver." In Prov. 30:28 a different Hebrew word (semamith) is used. It is rendered in the Vulgate by stellio, and in the Revised Version by "lizard." It may, however, represent the spider, of which there are, it is said, about seven hundred species in Palestine.

Easton's 1897 Bible Dictionary
Cite This Source
Example sentences
As every schoolboy discovers, pulling some of the legs off a spider does not
  stop it walking.
If the spider feels threatened, it will rub its legs against its abdomen,
  launching these hairs into the air.
Monitor for scale, mealybugs, or spider mites and spray with an insecticidal
  soap if necessary.
Snippets of spider genes let mutant silkworms spin silk stronger than steel.
Images for spider
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature