The verb delineate means to describe something in detail and accurately (the outline, position, and the like).

Synonyms are define, trace, sketch, or portray.

The word origins from Latin (1550s) delineatus, past participle of delineare meaning “to sketch out”. Originating at de- meaning “completely” + lineare meaning “draw lines”, linea meaning “line”. In c. 1600, delineate was described as “represent pictorially” and in 1610s as “describe, represent to the mind or understanding, portray in words”.

I have a bad memory so it is hard for me to delineate things.

I don’t think this direction sketch is clearly delineated.

The boundaries were clearly delineated.