American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "sf" in a sentence
"And the word sf is usually reserved for serious (science) fiction."
"There is nothing in 'sf' that says God cant speak or there is a God or their isnt."
"Where all that’s left is the two figurae of the label sf, the definition is empty."