A body opening or passage, such as the opening of the ear or the urethral canal.(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 "meatus" in a sentence
"The meatus is the opening of the urethra in the top thing on the end, the glans penis."
"The meatus is the narrowest part of it, and the prostatic part is the widest."
"The 'meatus' contains three distinct channels; and the air, loitering, as it were, in it, and being longer in contact with the sensitive membrane by which it is lined, contributes to the acuter sense of smell."