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.
Wiktionary(0.00 / 0 votes)Rate this definition: litmus(Noun) A dyestuff extracted from certain lichens, that changes color when exposed to pH levels greater than or less than certain critical levels. litmus(Noun) A simple test of acidity in a liquid using litmus, usually in the form of litmus paper. litmus(Noun) A simple test of any attribute; a litmus test.