| singular |
having to do with or designating the form of a word that indicates only one. [2 definitions] |
| sinister |
threatening or suggesting evil, injury, or danger; ominous. |
| sink |
to fall or drop slowly to another level. [8 definitions] |
| sinker |
a small weight used to lower a fishing line or net under water. |
| sinuous |
having many curves or turns. |
| sinus |
any of the hollow places in the skull that connect with the nose. |
| Sioux |
a member of a group of Native American peoples who are from the plains of the northern United States and southern Canada. |
| sip |
to drink slowly and a little at a time. [3 definitions] |
| siphon |
a tube or pipe used to suck a liquid over the top of its container and into a lower one by means of air pressure. [2 definitions] |
| sir |
(often capitalized) a form of address for a man, usually used in place of his name. [2 definitions] |
| siren |
a warning device that makes a loud, piercing noise. |
| Sirius |
the brightest star in the sky. Sirius is in the constellation Canis Major and is also called the Dog Star. |
| sissy |
a coward. |
| sister |
a female having the same parents as another person. [3 definitions] |
| sisterhood |
the relationship between or among sisters. [2 definitions] |
| sister-in-law |
the sister of one's husband or wife. [2 definitions] |
| sit |
to be in a position in which one is resting on the buttocks and thighs. [6 definitions] |
| site |
the location or proposed location of a town, city, building, or event. |
| sit tight |
to stay and wait for further information or events. |
| situation |
state of affairs; circumstances. |
| sit-up |
an exercise for the stomach muscles. To do a sit-up, a person lies flat on the back and sits up without bending the legs or using the arms. |