Definition of S:

• ( thermodynamics) a thermodynamic quantity representing the amount of energy in a system that is no longer available for doing mechanical work; " entropy increases as matter and energy in the universe degrade to an ultimate state of inert uniformity"
• the nineteenth letter of the English alphabet, is a consonant, and is often called a sibilant, in allusion to its hissing sound. It has two principal sounds; one a mere hissing, as in sack, this.
• Nineteenth letter of the alphabet. S. stands for south.
• The nineteenth letter in the English alphabet, has two sounds, as in miss and rose.
• the nineteenth letter of the English alphabet, is a consonant, and is often called a sibilant, in allusion to its hissing sound. It has two principal sounds; one a mere hissing, as in sack, this; the other a vocal hissing the same as that of z, as in is, wise. Besides these it sometimes has the sounds of sh and zh, as in sure, measure. It generally has its hissing sound at the beginning of words, but in the middle and at the end of words its sound is determined by usage. In a few words it is silent, as in isle, debris. With the letter h it forms the digraph sh. See Guide to pronunciation, // 255-261.
• The common plural sign, becoming - es, after sibilants; as, cats, boxes.
• The ending of the third person singular present indicative.
• the cardinal compass point that is at 180 degrees
• The nineteenth letter in the English alphabet.

Usage examples for S

1. What a husband she's got!  How to Cook Husbands by Elizabeth Strong Worthington

2. But how's it to be did, Mistah Sam?  Lost in the Cañon by Alfred R. Calhoun

3. Yet He came not to destroy men's lives but to save them.  The Gospel According to St. Mark by G. A. Chadwick

4. S. O. Now, look here.  On the Heels of De Wet by The Intelligence Officer