| 释义 |
ad·di·tion
\əˈdishən, aˈ-\ noun
(-s)
Etymology: Middle English addicioun, from Middle French addition, from Latin addition-, additio, from additus + -ion, -io -ion
1.
a. : the result of adding : anything added : increase, augmentation
< the clerk was a recent addition to the staff >
b. : something added that improves or increases value
< that table is certainly an addition to the room >
2. : the act or process of adding : the joining or uniting of one thing to another
< the subject stood in need of correction and addition — Benjamin Farrington >
3. obsolete : a designation (as of rank or place of residence) added to a person's name
< the names of those justices … with all their additions and titles — William Penn >
4.
a. : the process denoted by the sign + of combining two or more numbers so as to obtain their sum
b. : the part of mathematics that treats of addition
5.
a. : a part added to or joined with a building to increase available space
b. : a suburban area marked out into streets and lots as a future residential section
c. additions plural : facilities, structures, equipment, or other property added to what is already in service
6. : direct chemical combination of two or more substances to form a single product
< the union of ethylene and chlorine to form ethylene dichloride is an addition reaction: C2H4+Cl2 → C2H4Cl2 >
— often contrasted with substitution
7.
a. : the amalgamation in logic of classes or of terms considered with reference to their denotation
< the logical addition of “white” and “sweet” results in “either white or sweet (or both)” >
b. : alternation 2
8. : a material used in the manufacture of portland cement other than water and untreated calcium sulfate that is interground with the clinker in an amount not exceeding two percent
9. : a dice game played with five dice the object being to achieve the highest numerical total in five or fewer casts
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- in addition
- in addition to |