There are multiple definitions - click on the translation that matches your context.

incoerente (com)

adjetivo

full

incoherent

adjective

Definitions of incoherent

if an argument or an idea is incoherent then it is unclear and not carefully considered. The term can also be used to describe unclear speech or writing.

David Collins said the legislation was "unnecessarily complex, incoherent" and almost impossible to apply.