Concerns around the definition of misinformation hamper ways of addressing purported problems associated with it, along with the fact that public understanding of the concept is often ignored. To this end, the present pilot survey study examines three broad issues, as follows: (1) contexts where the concept most applies to (i.e., face-to-face interactions, social media, news media, or all three contexts), (2) criteria people use to identify misinformation, and (3) motivations for sharing it. A total of 1897 participants (approximately 300 per country) from six different countries (Chile, Germany, Greece, Mexico, the UK, the USA) were asked questions on all three, along with an option to provide free text responses for two of them. The quantitative and qualitative findings reveal a nuanced understanding of the concept, with the common defining characteristics being claims presented as fact when they are opinion (71%), claims challenged by experts (66%), and claims that are unqualified by evidence (64%). Moreover, of the 28% (n = 538) of participants providing free text responses further qualifying criteria for misinformation, 31% of them mentioned critical details from communication (e.g., concealing relevant details or lacking evidence to support claims), and 41% mentioned additions in communication that reveal distortions (e.g., sensationalist language, exaggerating claims). Rather than being exclusive to social media, misinformation was seen by the full sample (n = 1897) as present in all communication contexts (59%) and is shared for amusement (50%) or inadvertently (56%).