Definition of incog in English:

incog

noun, adjective, & adverb

dated, informal
  • short for incognito
    • ‘The Prince said he would go to the Chinese dinner if he could go incog.’
    • ‘He might have privately thrown out a hint concerning the difference in our respective stations aboard the Julia; or else the planters must have considered him some illustrious individual, for certain inscrutable reasons, going incog.’

Pronunciation

incog

/ɪnˈkɒɡ/