adj.边缘的，不重要的
Merriam-Webster Online Dictionary
marginal (adjective)1.
written or printed in the of a page or sheet - margin 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 cultures and by incomplete assimilation 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
Merriam-Webster Online Thesaurus
marginal (adjective)located at or near a border
SYNONYMS:
frontier, marginalRELATED WORDS:
outermost, outmost; exterior, external, outer, outside, outwardNEAR ANTONYMS:
inner, inside, internal, inward; inmost, innermost; central, mid, middle