Definition: Usk (also spelled in Latin as "usks") refers to a group of people who have come together for mutual aid, especially in times of crisis or need. Definition: Usk typically refers to a religious community that gathers together to pray, work on projects, or engage in charitable activities. It is often used metaphorically in biblical references like describing the Israelites' "Usks" during their wandering in the wilderness under the leadership of Joshua (Num 14).