I. verb (~bed; ~bing) Etymology: ad lib Date: 1919 transitive verb to deliver spontaneously, intransitive verb to improvise especially lines or a speech, ~ noun II. adjective Date: 1935 spoken, composed, or performed without preparation
AD-LIB
Meaning of AD-LIB in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012