Hence/hens/ Definition 1 of 3Pro Tip 1/3Time Expression Used to describe a future point when something will happen, relative to now. I'll see you two days hence. Pro Tip 2/3Fixed Future Can suggest a fixed or determined time in the future, not just any time. We shall meet again a year hence. Pro Tip 3/3Formal Contexts More common in formal or literary writing, seldom used in casual conversation. This agreement expires three years hence.