All definitions on this guide unless otherwise stated, are from the Oxford English Dictionary.
Moser and Korstiens have defined Qualitative Research as follows:
Image: Rauschenberg, Robert, 1925-. Interview. 1955. Artstor, library.artstor.org/asset/ARTSTOR_103_41822001599040
Moser A, Korstjens I. Series: Practical guidance to qualitative research. Part 1: Introduction. Eur J Gen Pract. 2017 Dec;23(1):271-273. doi: 10.1080/13814788.2017.1375093. PMID: 29185831; PMCID: PMC8816396.