Wiktionary
n. (context Islam English) a Sufi method of discipline, meditation and mystical insight, or a religious order based on this.
Wikipedia
A Tariqa (or tariqah; ) is the term for a school or order of Sufism, or especially for the mystical teaching and spiritual practices of such an order with the aim of seeking Haqīqah, which translates as "ultimate truth".
A Tariqa has a Murshid (guide) who plays the role of leader or spiritual director. The members or followers of a tariqa are known as Murīdīn (singular Murīd), meaning "desirous", viz. "desiring the knowledge of knowing God and loving God" (also called a Faqīr )
The metaphor of "way, path" is to be understood in connection of the term sharia which also has the meaning of "path", more specifically "well-trodden path; path to the waterhole". The "path" metaphor of tariqa is that of a further path, taken by the mystic, which continues from the "well-trodden path" or exoteric of sharia towards the esoteric haqiqa. A fourth "station" following the succession of shariah, tariqa and haqiqa is called marifa. This is the "unseen center" of haqiqa, and the ultimate aim of the mystic, corresponding to the unio mystica in Western mysticism. Tasawwuf, Arabic word that refers to mysticism and Islamic esotericism, is known in the West as Sufism.