- any of several North American felines of the genus Lynx.
- a yellowish-gray, black-striped feline, Felis sylvestris, of Europe, western Asia, and northern Africa, resembling and closely related to the domestic cat, with which it interbreeds freely.
- a closely related feline, Felis sylvestris libyca, of northern Africa, believed to be the ancestor of the domestic cat.
- any of several other of the smaller felines, as the serval or ocelot.
- a domestic cat that has become feral.
- a quick-tempered or savage person.
- a single locomotive operating without a train, as one switching cars.
- an exploratory well drilled in an effort to discover deposits of oil or gas; a prospect well.
- a reckless or unsound enterprise, business, etc.
- wildcatter (def. 2).
- a shaped drum on a windlass, engaging with the links of an anchor chain.
- wildcat strike.
- characterized by or proceeding from reckless or unsafe business methods: wildcat companies; wildcat stocks.
- of or relating to an illicit enterprise or product.
- running without control or regulation, as a locomotive, or apart from the regular schedule, as a train.
- to search an area of unknown or doubtful productivity for oil, ore, or the like, especially as an independent prospector.
- to engage in a wildcat strike.
- to search (an area of unknown or doubtful productivity) for oil, ore, or the like.
- a wild European cat, Felis silvestris, that resembles the domestic tabby but is larger and has a bushy tail
- any of various other felines, esp of the genus Lynx, such as the lynx and the caracal
- US and Canadian another name for bobcat
- a savage or aggressive person
- an exploratory drilling for petroleum or natural gas
- an unsound commercial enterprise
- a railway locomotive in motion without drawing any carriages or wagons
- (modifier) US and Canadian
- of or relating to an unsound business enterprise
- financially or commercially unsound
- (of a train) running without permission or outside the timetable
- to drill for petroleum or natural gas in an area having no known reserves