Definition of sis
: sister —usually used in direct address
Recent Examples of sis from the Web
This honeycomb-jasmine mix is equal parts sweet and sophisticated — like the hot toddy’s cooler sis.
My tentative youngest decided to watch her big sis first before committing to the ride.
Equally enviable is the actress’ parade of designer shades, courtesy of THR Power Stylist Samantha McMillen (who also dresses Fanning’s older sis, Dakota).
Big sis Kate (also known as the Duchess of Cambridge) will be there with husband Prince William and royal toddlers, George and Charlotte.
While Miley Cyrus moves in a rootsier direction with her new music, younger sis Noah Cyrus is taking over some of Miley's Bangerz swagger.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'sis'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of sis
Definition of SIS
Secret Intelligence Service ◆The Secret Intelligence Service is a British government agency that is responsible for the collection and analysis of information about foreign countries or groups.
Definition of -sis
: process : action peristalsis
Origin and Etymology of -sis
Latin, from Greek, feminine suffix of action
Learn More about sis
Seen and Heard
What made you want to look up sis? Please tell us where you read or heard it (including the quote, if possible).