1 noun MILdaingean masc1 c m u2 noun strongholdtheir home pitch has always been a real fortressbhí siad riamh deacair a shárú ar a bpáirc féinDerry has been a fortress for the partytá an páirtí thar a bheith láidir i nDoire3 noun somewhere inaccessibledún masc1 c m udaingean masc1 c m uthe office is like a fortresstá an oifig mar a bheadh daingean ann
