Invasive neurotechnologies are a frequent subject of discussion in neuroethics. Technologies, like deep brain stimulation and implantable brain-computer interfaces, are thought to hold significant promise for human health and well-being, but they also raise important ethical questions about autonomy, safety, stigma, privacy, and agency, among others. The terms ‘invasive’ and ‘invasiveness’ are commonly applied to these and other neurotechnologies, yet the concept of invasiveness itself is rarely defined or delimited. Some have suggested that invasiveness may have multiple meanings – physical, (...) emotional, or lifestyle – and that confusion about how people use the terms may lead to harm, especially for users of invasive devices. It is uncertain if debates in neuroethics contribute to this confusion. To investigate this, we conducted a study of how the term ‘invasiveness’ is used in neuroethics. We found that neuroethicists almost always use ‘invasiveness’ to refer to the physical features of interventions, and rarely to refer to other senses of invasiveness. We also found that referencing invasiveness does not determine which ethical issues are prioritized for a given type of neurotechnology. Overall, this study affirms the importance of understanding the meaning and use of the concept of invasiveness in ethical discussion of neurotechnology while also suggesting the need for further work in the area and consideration for rethinking what forms of technology we consider to be invasive. (shrink)