noun

• (Internet) A program which follows links on the World Wide Web in order to gather information.
  "Crawler-based search engines have three major elements. The first is the spider, also called the crawler, which visits a web page, reads it, and then follows links to other pages within the site."
• (chiefly Australia and New Zealand) A float (drink) made by mixing ice-cream and a soda or fizzy drink (such as lemonade).
  "2002, Katharine Gasparini, Cranberry and vanilla ice cream spider, recipe in Cool Food, page 339."
• (Australia, New Zealand, obsolete) An alcoholic drink made with brandy and lemonade or ginger beer.
• (slang) A spindly person.

verb

• (intransitive) To move like a spider.
  "A year later she returned to El Cap and spidered up the wall again — this time in 23 hours."
• (intransitive) To cover a surface like a cobweb.
  "High walls surrounded it on all sides, each one covered with the skeletal stems of climbing plants that spidered across the stones, and the ground was cobbled between patches of frozen grass."
• (Internet, of a computer program) To follow links on the World Wide Web in order to gather information.
  "The online dictionary is regularly spidered by search engines."