WJ may refer to:

Wújí 無極 (literally "without ridgepole") originally meant "ultimate; boundless; infinite" in Warring States period (476-221 BCE) Taoist classics, but came to mean the "primordial universe" prior to the Taiji 太極 "Supreme Ultimate" in Song Dynasty (960-1279 CE) Neo-Confucianist cosmology. Wuji is also a proper noun in Modern Standard Chinese usage; for instance, Wuji County in Hebei.

The word Wuji

Chinese wuji 無極 "limitless; infinite" is a compound of wu 無 "without; no; not have; there is not; nothing, nothingness" and ji 極 "ridgepole; roof ridge; highest/utmost point; extreme; earth's pole; reach the end; attain; exhaust". In analogy with the figurative meanings of English pole, Chinese ji 極 "ridgepole" can mean "geographical pole; direction" (e.g., siji 四極 "four corners of the earth; world's end"), "magnetic pole" (Beiji 北極 "North Pole" or yinji 陰極 "negative pole; cathode"), or "celestial pole" (baji 八極 "farthest points of the universe; remotest place").

Common English translations of the cosmological Wuji are "Ultimateless" (Fung and Bodde 1953, Robinet 2008) or "Limitless" (Zhang and Ryden 2002), but other versions are "the ultimate of Nothingness" (Chang 1963), "that which has no Pole" (Needham and Ronan 1978), or "Non-Polar" (Adler 1999).

Washington & Jefferson College, also known as W & J College or W&J, is a private liberal arts college in Washington, Pennsylvania, in the United States, which is 30 miles (48 km) south of Pittsburgh. The college traces its origin to three log cabin colleges in Washington County established by three Presbyterian missionaries to the American frontier in the 1780s: John McMillan, Thaddeus Dod, and Joseph Smith. These early schools eventually grew into two competing academies and colleges, with Canonsburg Academy, later Jefferson College, located in Canonsburg and Washington Academy, later Washington College, in Washington. These two colleges merged in 1865 to form Washington & Jefferson College. The 60-acre (24 ha) campus, located in Washington, Pennsylvania, has more than 40 buildings, with the oldest dating to 1793. While the college has historically had a difficult relationship with the city of Washington, including clashes over college expansion and finances, recent efforts have been made to improve those relations.