'In secret' definitions:

Definition of 'in secret'

From: WordNet
adverb
In secrecy; not openly; "met secretly to discuss the invasion plans"; "the children secretly went to the movies when they were supposed to be at the library"; "they arranged to meet in secret" [syn: secretly, in secret, on the Q.T., on the QT]

Definition of 'In secret'

From: GCIDE
  • Secret \Se"cret\, n. [F. secret (cf. Pr. secret, Sp. & Pg. secreto, It. secreto, segreto), from L. secretum. See Secret, a.]
  • 1. Something studiously concealed; a thing kept from general knowledge; what is not revealed, or not to be revealed. [1913 Webster]
  • To tell our own secrets is often folly; to communicate those of others is treachery. --Rambler. [1913 Webster]
  • 2. A thing not discovered; what is unknown or unexplained; a mystery. [1913 Webster]
  • All secrets of the deep, all nature's works. --Milton. [1913 Webster]
  • 3. pl. The parts which modesty and propriety require to be concealed; the genital organs. [1913 Webster]
  • In secret, in a private place; in privacy or secrecy; in a state or place not seen; privately. [1913 Webster]
  • Bread eaten in secret is pleasant. --Prov. ix. 17. [1913 Webster]