1. A field of study, practice, or activity that lacks proper authorization, credibility, or legal standing
He criticized astrology as an illegitimate field of science.
Ele criticou a astrologia como um campo ilegítimo da ciência.
2. In academic or professional contexts, an area of work that does not meet established standards or recognized criteria
Some consider alternative medicine to be an illegitimate field without proper scientific validation.
Alguns consideram a medicina alternativa um campo ilegítimo sem validação científica adequada.