[n. of action f. L. lallāre to sing lalla or lullaby (Lewis & Sh.). Cf. F. lallation.] † a. Childish utterance (obs.). b. An imperfect pronunciation of r, by which the sound of that letter is confused with that of l; lambdacism.
1647. R. Baron, Cyprian Acad., A ij b. This makes me hope that you will dispence with the Lallation and Low dialect of this babe [sc. a book], whose tone is rude.
1864. R. F. Burton, Dahome, I. 158. The Popos and Dahomans have the same lallation as the Chinese, who call rum lum.