say it: NAP-ing
napping is an adjective meaning "not prepared or vigilant". It carries one recorded sense.
not prepared or vigilant
“the blow caught him napping”
“caught in an off-guard moment”
“found him off his guard”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for napping come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.