A written message; a letter. See Synonyms at letter.(noun)
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 "missive" in a sentence
"We can do the Moon with that amount of money and our missive is at least one way to do that."
"Therefore the purpose of this missive is to look at where many in society see our future going, and to show where space either supports the positive aspects or negates the negative ones."
"But even the most finely crafted missive is only as effective as its subject lines -- the teaser (50 characters or less) that convinces a recipient to open the message in the first place."