Everything we need to know about hantavirus after recent deaths on cruise ship

The Tennessean Nashville on MSN: What to know about Kyle Busch's death, NASCAR driver's recent health issues

What to know about Kyle Busch's death, NASCAR driver's recent health issues

MSN: Mysterious deaths, disappearances of CA scientists a 'grave' national security concern: What to know

Mysterious deaths, disappearances of CA scientists a 'grave' national security concern: What to know

The New York Times: What to Know About the Ebola Outbreak as Cases and Deaths Rise

What to Know About the Ebola Outbreak as Cases and Deaths Rise

The meaning of KNOW is to perceive directly : have direct cognition of. How to use know in a sentence.

KNOW definition: to perceive or understand as fact or truth; to apprehend clearly and with certainty. See examples of know used in a sentence.

KNOW meaning: 1. to have information in your mind: 2. used to ask someone to tell you a piece of information…. Learn more.

Used parenthetically in conversation, as to fill pauses or educe the listener's agreement or sympathy: Please try to be, you know, a little quieter. How were we supposed to make camp in a storm like that, you know? [Middle English knouen, from Old English cnāwan; see gnō- in Indo-European roots.]

To comprehend is to know something thoroughly and to perceive its relationships to certain other ideas, facts, etc. To understand is to be fully aware not only of the meaning of something but also of its implications: I could comprehend all he said, but did not understand that he was joking.