Nail/neɪl/ Definition 1 of 4Pro Tip 1/3Construction Vocabulary Used frequently in discussions about building or repairing things. The carpenter sorted different-sized nails before starting work. Pro Tip 2/3Metaphoric Uses Sometimes used metaphorically to mean a crucial point in an argument or theory. Her argument had one final nail to prove her point. Pro Tip 3/3Collocations Matter Often collocates with 'hammer' when talking about the action of using it. Make sure to hold the nail steady while you hammer it in.