sis

noun \ ˈsis \

Definition of sis

:sister usually used in direct address

Recent Examples of sis from the Web

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

1656


SIS

abbreviation

Definition of SIS

Secret Intelligence Service
Note: The Secret Intelligence Service is a British government agency that is responsible for the collection and analysis of information about foreign countries or groups.

-sis

noun suffix

Definition of -sis

plural -ses
:process :action
  • peristalsis

Origin and Etymology of -sis

Latin, from Greek, feminine suffix of action


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to suppress quietly or indirectly

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