1 noun especially POLICE, MIL by police, security servicesfaireachas masc1 c m ufaire fem4 c m uto have sb under surveillancefaireachas a dhéanamh ar dhuine, duine a fhairethey're under surveillancetáthar á bhfaireelectronic surveillancefaire leictreonachvideo surveillancefísfhaireachas masc1, físfhaire fem42 noun medical monitoring MEDfaireachas masc1 c m ufaire fem4 c m u