If something is high, it means that it is…
To nap means ‘to sleep for a short period of time,’ especially during the daytime. Figuratively, it means ‘to be off your guard.’ As a noun, a nap is a short period of sleep. Unrelatedly, a nap is the raised fuzzy end of fibers on the surface of cloth and the verb to nap means ‘to raise the nap.’ Nap is also used as a shortened version of…