to be good at finding a particular thing to have a nose for something a police officer who is below an inspector sergeant to stop working because you have reached a certain age to retire a holiday on a large ship a cruise a police officer who is above a sergeant inspector to be given a more important or higher-level job to be promoted describing someone that you can trust to behave in the way you want or need reliable anything that helps to show if something is true or not true about a crime evidence