1. 刻画;描述;阐明
If you delineate something such as an idea or situation, you describe it or define it, often in a lot of detail.

1. describe in vivid detail

2. make a mark or lines on a surface

e.g. draw a line
trace the outline of a figure in the sand

Synonym: tracedrawlinedescribe

3. trace the shape of

Synonym: limnoutline

4. determine the essential quality of

Synonym: specifydefinedelimitdelimitate

5. show the form or outline of

e.g. The tree was clearly defined by the light
The camera could define the smallest object

Synonym: define