in this paper, an approach will be made to Heidegger's concepts of existence and being-in-the-world, as they are exposed in Being and time, that is, from the hermeneutics of Dasein, although in some passages other works by the German author will also be used, either to clarify or reinforce certain aspects of the subject. Likewise, it will seek to show how these concepts are related and framed in a broader investigation on the question of the meaning of being. In short, the objective of this paper is to develop an approach to the concepts of existence and being-in-the-world or being-in-the-world and their relationship and place within the Heideggerian inquiry that questions the meaning of being. In addition, some similarities and links between Heidegger's thought and that of Ortega y Gasset and Sartre will be indicated, in broad strokes, always having as points of reference the central concepts addressed in this work. Finally, it will be considered if the philosophical readings of the examined authors are still adequate to describe the phenomenon of life, that is, the human being and its concrete existence.
