[{"Bold_text": "noun", "List Items": ["a person sentenced to or serving a term of life .", "a person committed to a professional lifetime career in the military.", "a person who has devoted a lifetime to a profession, occupation, or pursuit.", "(in birding)Also calledlife bird.a species of bird not seen previously and that will therefore be added to the bird watcher's life list life list.the sighting of a bird of a previously unseen species:It seems like forever since I've had a lifer!", "Also calledlife bird.a species of bird not seen previously and that will therefore be added to the bird watcher's life list life list.", "the sighting of a bird of a previously unseen species:It seems like forever since I've had a lifer!"]}]