co-occur
verb
co-oc·cur
ˌkō-ə-ˈkər 
co-occurred; co-occurring
: to occur at the same time or in the same place
symptoms that often co-occur
co-occurring species
… certain words co-occur or collocate regularly with certain other words.—
Morton Benson
Morton Benson
co-occurrence
noun
plural co-occurrences
co-occurrence of the reactions
co-occurrence of two diseases
Examples of co-occur in a Sentence
the chronic depression that so often co-occurs with drug abuse
Recent Examples on the Web
Sometimes, these factors can co-occur with stress, leading to hair loss.
—Michael MacIntyre, Verywell Health, 31 Jan. 2025
Excessive alcohol use is linked to cognitive decline and neurodegenerative diseases such as Alzheimer’s, and mental health conditions such as anxiety and depression often co-occur with high levels of drinking.
—Cassie Shortsleeve, SELF, 3 Jan. 2025
Many individuals with autism also experience co-occurring health issues such as attention-deficit/hyperactivity disorder, seizures, or chronic gastrointestinal problems.
—Bloomberg, The Mercury News, 27 Dec. 2024
Anxiety Anxiety disorders, such as obsessive-compulsive disorder (OCD), can co-occur with polyphagia due to the emotional and psychological impact on eating behaviors.
—Sarah Jividen, Health, 5 Dec. 2024
And thanks to atmospheric conditions, these two factors are most likely to co-occur during the late fall and early winter.
—Erica Sloan, SELF, 21 Oct. 2024
The ‘Hikikomori’ syndrome: worldwide prevalence and co-occurring major psychiatric disorders: a systematic review and meta-analysis protocol
International Journal of Social Psychiatry.
—Paul Smaglik, Discover Magazine, 7 Aug. 2024
Mental health conditions, like anxiety and depression, can also lead to or co-occur with insomnia, but insomnia also dramatically increases the risk of developing these conditions.
—Dominique Fluker, Essence, 9 Jan. 2024
Over time, a neural network trained to predict which words co-occur with other words learned to place similar words (like dog and cat) close together in vector space.
—Timothy B. Lee and Sean Trott, Ars Technica, 31 July 2023
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Michael MacIntyre, Verywell Health, 31 Jan. 2025
Excessive alcohol use is linked to cognitive decline and neurodegenerative diseases such as Alzheimer’s, and mental health conditions such as anxiety and depression often co-occur with high levels of drinking.
—Cassie Shortsleeve, SELF, 3 Jan. 2025
Many individuals with autism also experience co-occurring health issues such as attention-deficit/hyperactivity disorder, seizures, or chronic gastrointestinal problems.
—Bloomberg, The Mercury News, 27 Dec. 2024
Anxiety Anxiety disorders, such as obsessive-compulsive disorder (OCD), can co-occur with polyphagia due to the emotional and psychological impact on eating behaviors.
—Sarah Jividen, Health, 5 Dec. 2024
And thanks to atmospheric conditions, these two factors are most likely to co-occur during the late fall and early winter.
—Erica Sloan, SELF, 21 Oct. 2024
The ‘Hikikomori’ syndrome: worldwide prevalence and co-occurring major psychiatric disorders: a systematic review and meta-analysis protocol
International Journal of Social Psychiatry.
—Paul Smaglik, Discover Magazine, 7 Aug. 2024
Mental health conditions, like anxiety and depression, can also lead to or co-occur with insomnia, but insomnia also dramatically increases the risk of developing these conditions.
—Dominique Fluker, Essence, 9 Jan. 2024
Over time, a neural network trained to predict which words co-occur with other words learned to place similar words (like dog and cat) close together in vector space.
—Timothy B. Lee and Sean Trott, Ars Technica, 31 July 2023
Cite this Entry
“Co-occur.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/co-occur. Accessed 15 Mar. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share