The concepts migrate, so does the concept of adaptation. Between biology, discipline of origin and adaptation to climate change, we place ourselves in the second, particularly in the use of the concept as well as its perception. In fact, we seek to bring new elements of disambiguation by identifying pragmatic and enunciative semes relevant to the situation in which this concept was born. We designate by situation, a speech which is none other than "the utterance considered in its interactive dimension, its power of action on others, its inscription in a situation of enunciation (an enunciator, an allocution, a moment, a specific place) "(Maingueneau, 1991: 15), a discourse stemming from the dynamics governing the international discourse on climate change supported by the IPCC. The established meaning is situational, contextual and interdiscursive.

Keywords: Adaptation, climate change, discursive semantics