a contextual definition of `legal duty' might be `X has a legal duty to do Y means that X is required to do Y by a contract relationship that would be upheld in a court of law'.
Examples of contextual definition
contextual definition
So what should be our contextual definition of colonization?
From the economist.com
Almost by definition, experiential learning is contextual.
From the forbes.com
Do not, however, add contextual links that don't relate directly to the topic's definition or reason for notability.
From the en.wikipedia.org
However, this definition is somewhat nebulous and the best description of the word is based on the contextual situations.