Definition of "stedfast"

…water is of itself fleeting, but by strength of cold it is turned and made stedfast crystal.

1908, Julia de Wolf Addison, Arts and Crafts in the Middle Ages‎, Reprint edition, Project Gutenberg, published 2006

… Samuel Gompers directed against the whole Rockefeller investigation into industry, that organized labor will continue to remain sternly aloof and to view this new activity with stedfast distrust.

1915 August 23, Frank P. Walsh, “Perilous Philanthropy”, in The Independent

Could heroics give her back her son? Nay, she must be stedfast, even though false security had betrayed her hidden softness.

1935, Charles Caldwell Dobie, San Francisco Tales‎, Digitized Reprint edition (Fiction), D. Appleton-Century, published 2007, page 190

… Bright Star, would I were stedfast as thou art, are worthy to be ranked with those of Shakespeare.

1979, Edward Albert, quoting John Keats, edited by James Alfred Stone, History of English Literature, 5th edition, digitized, Harrap, published 2009