- Also called: MI6
(in Britain) Secret Intelligence Service
Collins Concise English Dictionary © HarperCollins Publishers::
sis /sɪs/USA pronunciation
n. [countable* usually used as a term of address;
often: Sis]
WordReference Random House Unabridged Dictionary of American English © 2026often: Sis]
- Informal Termssister:Hey, Sis, wake up Mom and Dad.
sis
(sis),USA pronunciation n. [Informal.]
-sis,
- Informal Termssister.
- 1825–35, American; shortened form; compare Dutch zus for zuster sister
-sis,
- a suffix appearing in loanwords from Greek, where it was used to form from verbs abstract nouns of action, process, state, condition, etc.:thesis; aphesis.
- Greek
Collins Concise English Dictionary © HarperCollins Publishers::
short for sister
an exclamation of disgust
'SIS' also found in these entries (note: many are not synonyms or translations):
-asis
- Six
- accrual basis
- achalasia
- adiadochokinesia
- adipose
- aeroscepsy
- alcoholic psychosis
- alexia
- amphimixis
- amyotrophic lateral sclerosis
- anabiosis
- anaclisis
- anacoenosis
- anacrusis
- anacusis
- anadiplosis
- anagnorisis
- analysis
- anamnesis
- anamorphoscope
- anamorphosis
- anaptyxis
- anatase
- anatexis
- anemosis
- anhidrosis
- anorexia
- anthesis
- antiphrasis
- antithesis
- antituberculosis
- anuresis
- anxiety neurosis
- aortic stenosis
- apheresis
- aphesis
- apocalypse
- apodosis
- apomixis
- aponeurosis
- apophasis
- apophysis
- aposiopesis
- apostasy
- apsis
- arsis
- arthrodesis
- arthrosis
- artificial ankylosis