Definition of "fog" []

• Condensed water vapor in cloudlike masses lying close to the ground and limiting visibility. (noun)
• An obscuring haze, as of atmospheric dust or smoke. (noun)
• A mist or film clouding a surface, as of a window, lens, or mirror. (noun)
• A cloud of vaporized liquid, especially a chemical spray used in fighting fires. (noun)
• A state of mental vagueness or bewilderment. (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.

• "Trying to string together coherent sentences though the brain fog is hard."
• "Dew is a precipitation of moisture which has not entered the peculiar state which we term fog or cloud, but has remained invisible in the air."
• "For the private sector, one of the most important signals that cuts through the fog is the profit and loss statement."