Y, y

[ wahy ]
/ waɪ /

noun, plural Y's or Ys, y's or ys.

the 25th letter of the English alphabet, a semivowel.
any spoken sound represented by the letter Y or y, as in yet, city, or rhythm.
something having the shape of a Y.
a written or printed representation of the letter Y or y.
a device, as a printer's type, for reproducing the letter Y or y.

Definition for ys (2 of 3)


Also called ys

Definition for ys (3 of 3)


[ yok-tuh-sek-uh nd ]
/ ˈyɒk təˌsɛk ənd /


one septillionth (10-24) of a second. Abbreviation: ysec, ys
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ys

Science definitions for ys


The symbol for yttrium.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.