What is the difference between hard return and soft return? A hard return is when the user hits the return or enter key to bring subsequent text onto a new line. If you keep typing until the text reaches the end of the line and it star â¦ ts on a new line itself automatically, that is a soft return.
Definition of litmus. 1  1 : a coloring matter from lichens that turns red in acid solutions and blue in alkaline solutions and is used as an acid-base indicator. 2  2 : the critical factor in a litmus test; also : litmus test.
a. a substance, as litmus, that indicates the presence or concentration of a certain constituent. b. a substance often used in a titration to indicate the point at which the reaction is complete. 5. a plant or animal that indicates by its presence in a given area the existence of certain environmental conditions.