Definition of "at all"

at all

adverb
not comparable
1. (idiomatic) Indicating degree, quantity or frequency greater than zero: to the slightest degree, in any way, at any time or in any circumstance.
  Quotations
  Here's neither buſh, nor ſhrub to beare off any weather at all: and another Storme brewing, I heare it ſing ith' winde: yond ſame blacke cloud, yond huge one, lookes like a foule bumbard that would ſhed his licquor: if it ſhould thunder, as it did before, I know not where to hide my head: yond ſame cloud cannot chooſe but fall by paile-fuls.
  1610–1611 (date written), William Shakespeare, “The Tempest”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, [Act II, scene ii], page 9
  He did not seem to think that he at all deserved a medal from the Humane and Magnanimous Societies.
  1851, Herman Melville, Moby-Dick, Chapter 13: Wheelbarrow
  The judge, by the way, was the King; and as he wore his crown over the wig, (look at the frontispiece if you want to see how he did it), he did not look at all comfortable, and it was certainly not becoming.
  1865, Lewis Carroll, Alice's Adventures in Wonderland, Chapter 11: Who Stole the Tarts?
  After a while he descended the steps into the road again and he stood there and looked all about him and listened for any sound at all but there was nothing.
  1993, Cormac McCarthy, Outer Dark, page 146