1. 装饰(物);镶边
The trimming on something such as a piece of clothing is the decoration, for example along its edges, that is in a different colour or material.
2. (切取所需部分以后的)下脚料，剩余物
Trimmings are pieces of something, usually food, which are left over after you have cut what you need.
3. 种种额外的东西;外加的种种配搭
If you say that something comes with all the trimmings, you mean that it has many extra things added to it to make it more special.
1. the act of adding decoration
e.g. the children had to be in bed before it was time for the trimming of the tree
2. cutting down to the desired size or shape
3. a decoration or adornment on a garment
e.g. the trimming on a hat
the trim on a shirt
Synonym: trimpassementerie