--- license: llama2 --- SLIMER is an instruction-tuned LLM (LLaMA-2-7B based) for NER. Instructed on a reduced number of samples, it is designed to tackle never-seen-before named entity tags by leveraging a prompt enriched with a definition and guidelines for the NE to be extracted. Furthermore, SLIMER performs comparably to state-of-the-art approaches in out-of-domain zero-shot NER, while being trained on a reduced tag set.