Abstract
The goal of this work is to extend the concept of the linguistic variable to the interval-valued case since there are some situations where their application would be justified, as can be seen in this paper. After a brief introduction on fuzzy numbers and linguistic variables in [0, 1], we define the interval-valued linguistic variables and we study their behaviour through three properties. In the second part of the paper, we show their utility for replacing the absent values in an L-fuzzy context.