ad lib adj (infml 口) (esp of speaking and performing in public) without preparation; spontaneous （尤指當眾講話及表演）未經事先準備的, 即興的, 即席的 give an ad lib (ie improvised) performance 作即興表演. ad lib, adv (infml 口) 1 without preparation; spontaneously 即興地; 即席地; 臨時地 I had forgotten to bring my notes and had to speak ad lib. 我忘記帶講稿了, 只好臨時講幾句. 2 as one pleases; without restraint; freely 隨便地; 無拘束地; 自由地 We were told to help ourselves to the food ad lib. 這些食物讓我們隨便吃. ad lib, v (-bb-) [I] (infml 口) speak or act without preparation, esp when performing in public; improvise 臨時講話或表演（尤指當眾）; 即席表演 The actress often forgot her lines but was very good at ad libbing. 那個女演員常忘臺詞, 卻極擅長臨時拼湊.