set net noun 1verb 1forms 5 noun1 •A fishing net that is used by securing it to a fixed underwater framework.Large set nets are used to catch large pelagic species such as tuna, yellowtail, and salmon as well as demersal species such as sea bream. — 2011 verb1 •To fish using a set net.I have fished (set netted) the Situk River. — 1985 formsset netted · set-netted · set netting · set nets · set-nets