1
: a unit of inferred distance between genes on a chromosome that is used in constructing genetic maps and is equal to the distance for which the frequency of crossing over between specific pairs of genes is 100 percent
2
: any of an American breed of light strong horses originated in Vermont from the progeny of one prepotent stallion of uncertain ancestry
Cite this Entry
“Morgan.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/morgan. Accessed 3 Nov. 2025.
Copy CitationKids Definition
Morgan
noun
Mor·gan
ˈmȯr-gən 
: any of an American breed of light strong horses
Medical Definition
morgan
noun
mor·gan
ˈmȯr-gən
1
: a unit of inferred distance between genes on a chromosome that is used in constructing genetic maps and is equal to the distance for which the frequency of crossing-over is 100 percent
2
Biographical Definition
Morgan 1 of 7
biographical name (1)
Mor·gan
ˈmȯr-gən
Daniel 1736–1802 American general in Revolution
Morgan
2 of 7biographical name (2)
Sir Henry 1635–1688 English buccaneer
Morgan
3 of 7biographical name (3)
John Hunt 1825–1864 American Confederate cavalry officer
Morgan
4 of 7biographical name (4)
J(ohn) P(ier*pont)
ˈpir-ˌpänt
1837–1913 American financier
1837–1913 American financier
Morgan
5 of 7biographical name (5)
J(ohn) P(ierpont), Jr. 1867–1943 son of J.P. Morgan American financier
Morgan
6 of 7biographical name (6)
Thomas Hunt 1866–1945 American geneticist
Morgan
7 of 7biographical name (7)
William Wilson 1906–1994 American astronomer
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