Ad-lib and ad lib

The term ad-lib is derived from a Latin phrase, though the current meaning deviates from the original meaning. We will examine the definition of ad-lib, where the term came from and some examples of its use in sentences.Ad-lib means to do something spontaneously, to do something without prior planning or practice. It may be used […]
from Grammarist
http://grammarist.com/usage/ad-lib-and-ad-lib/