Ad-lib and Ad lib

Ad-lib adjective - Made or done without previous thought or preparation.

Ad lib and ad-lib are semantically related In some cases you can use "Ad lib" instead the phrase "Ad-lib" as a noun or a verb or an adjective or an adverb.

Ad lib adverb - Without advance preparation.

Ad-lib and ad lib are semantically related in not ready topic. Sometimes you can use "Ad-lib" instead the phrase "Ad lib" as a verb or an adjective or an adverb or a noun, if it concerns topics such as tending to act without thought, crude but serviceable, without preparation, instinctively.