1. noun ELECTRIC device2. noun AERO on rocket etc3. noun MED dose of vaccine4. noun of morale etc5. noun promoter1 noun ELECTRIC devicetreiseoir masc3 c m u2 (also booster rocket) noun AERO on rocket etctreisroicéad masc1 c m urocket boostertreiseoir roicéadach3 (also booster dose) noun MED dose of vaccineteanndáileog fem2 c m uTB boosterteanndáileog eitinne4 noun of morale etcmisneach masc1 c m uspreagadh masc c m uábhar misnighit was a great morale booster for the staffthug sé an-mhisneach don fhoireann, ba mhór an t-ábhar misnigh don fhoireann é5 noun (US) promoterboosters never mention the rainní luann lucht poiblíochta an bháisteach riamh, ní luann lucht bolscaireachta an fhearthainn riamh
