The definition of all is the entire amount.(adjective)
Red, orange, yellow, green, blue, indigo and violet are an example of all the colors of the rainbow.
See all in Webster's New World College Dictionary
Origin: ME al, all < OE eal < IE *al-no-s < base *al-, *ol-, beyond, exceeding > L ultra
Origin: all-(American)Sports selected as the best of (a specified category): all-league, all-conference, all-pro
See all in American Heritage Dictionary 4
Origin: Middle English al
Origin: , from Old English eall; see al-3 in Indo-European roots. Usage Note: The construction all that is used informally in questions and negative sentences to mean “to the degree expected.” In the late 1960s, the Usage Panel rejected its use, but evidently resistance to all that is crumbling. Seventy-two percent of the Panel now finds the construction acceptable in the sentence The movie is not all that interesting. • Sentences of the form All X's are not Y may be ambiguous. All of the departments did not file a report may mean that some departments did not file, or that none did. The first meaning can be expressed unambiguously by the sentence Not all of the departments filed a report. The second meaning requires a paraphrase such as None of the departments filed a report or All of the departments failed to file a report. The same problem can arise with other universal terms such as every in negated sentences, as in the ambiguous Every department did not file a report. See Usage Note at every.Our Living Language Among the newest ways of introducing direct speech in the United States is the construction consisting of a form of be with all, as in I'm all, “I'm not gonna do that!” And she's all, “Yes you are!” This construction is particularly common in the animated speech of young people in California and elsewhere on the West Coast, who use it more frequently than the informal East Coast alternatives, be like and go, as in He's like (or goes), “I'm not gonna do that!” These indicators of direct speech tend to be used more often with pronoun subjects (He's all, “I'm not᠁”) than with nouns (The man's all, “I'm not᠁”), and with the historical present (He's all᠁) than with the past (He was all᠁). All of these locutions can introduce a gesture or facial expression rather than a quotation, as in He's all᠁ followed by a shrug of the shoulders. Be all and be like can also preface a statement that sums up an attitude, as in “I'm all ‘No way!’” See Notes at go1, like2.
Learn more about all