1
: written or printed in the margin of a page or sheet
marginal notes
2
a
: of, relating to, or situated at a margin or border
b
: not of central importance
regards violence as a marginal rather than a central problem
also
: limited in extent, significance, or stature
had only marginal success with the business
c(1)
: occupying the borderland of a relatively stable territorial or cultural area
marginal tribes
(2)
: characterized by the incorporation of habits and values from two divergent (see divergent sense 1) cultures and by incomplete assimilation (see assimilate entry 1 sense 2a) in either
the marginal cultural habits of new immigrant groups
(3)
: excluded from or existing outside the mainstream of society, a group, or a school of thought
marginal voters
3
: located at the fringe of consciousness
marginal sensations
4
a
: close to the lower limit of qualification, acceptability, or function : barely exceeding the minimum requirements
a semiliterate person of marginal ability
b(1)
: having a character or capacity fitted to yield a supply of goods which when marketed at existing price levels will barely cover the cost of production
marginal land
(2)
: of, relating to, or derived from goods produced and marketed with such result
marginal profits
5
: relating to or being a function of a random variable that is obtained from a function of several random variables by integrating or summing over all possible values of the other variables
a marginal probability function
mar·gin·al·i·ty
ˌmärjəˈnalətē
plural -es
1
: the quality or state of being marginal
2
: the quality or state of relating to or being a function of a random variable that is obtained from a function of several random variables by integrating or summing over all possible values of the other variables
the marginality of the probability function
Cite this Entry
“Marginal.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/marginal. Accessed 5 Sep. 2026.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
