1
: a female who has one or both parents in common with another
2
often capitalized
a
: a member of a women's religious order (as of nuns or deaconesses)
especially
: one of a Roman Catholic congregation under simple vows
b
: a girl or woman who is a member of a Christian church
3
a
: a girl or woman regarded as a comrade
b
: a girl or woman who shares with another a common national or racial origin
especially
: a Black girl or woman
4
: one that is closely similar to or associated with another
sister cities
5
chiefly British
: nurse
7
: a member of a sorority
Examples of sister in a Sentence
The sisters live in the convent.
Recent Examples on the Web
Shafak’s words slice through centuries of rosy myths about motherhood, exposing the raw terror that biological creation might devour its artistic sister.
—
Fidan Cheikosman, JSTOR Daily, 1 Jan. 2025
Things also heat up in a different way throughout the group interview, with Arrietty — who hails from the same drag family as season 15's Irene Dubois and season 14's Bosco — reacts to her sisters unanimously naming her the villain of the season in EW's individual interviews.
—EW.com, 1 Jan. 2025
In The World, for this family drama about two sisters forced to deal with their estranged father following the death of their mother.
—Andreas Wiseman, Deadline, 1 Jan. 2025
His nephew, Alex Fries — the son of Renner’s sister Kym — was detaching the chain connecting the car to the plow, but Renner couldn’t see him and became concerned for his safety.
—Eric Andersson, People.com, 1 Jan. 2025
See all Example Sentences for sister 
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Fidan Cheikosman, JSTOR Daily, 1 Jan. 2025
Things also heat up in a different way throughout the group interview, with Arrietty — who hails from the same drag family as season 15's Irene Dubois and season 14's Bosco — reacts to her sisters unanimously naming her the villain of the season in EW's individual interviews.
—EW.com, 1 Jan. 2025
In The World, for this family drama about two sisters forced to deal with their estranged father following the death of their mother.
—Andreas Wiseman, Deadline, 1 Jan. 2025
His nephew, Alex Fries — the son of Renner’s sister Kym — was detaching the chain connecting the car to the plow, but Renner couldn’t see him and became concerned for his safety.
—Eric Andersson, People.com, 1 Jan. 2025
See all Example Sentences for sister
Dictionary Entries Near sister
Cite this Entry
“Sister.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sister. Accessed 18 Jan. 2025.
Copy CitationKids Definition
sister
noun
sis·ter
ˈsis-tər 
1
: a female who has one or both parents in common with another individual
2
often capitalized
: a member of a religious community of women : nun
3
a
: a fellow female member of a group
b
: a girl or woman who shares a common national or racial origin with another
4
: one that is closely similar to or associated with another
sister schools
sister ships
5
chiefly British
: nurse entry 1 sense 2
sisterly
adjective or adverb
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