nounAinmfhocal1zoologyzó-eolaíochtof animalbolgmasc1cmuit has a white underbellytá bolg bán air2aerospaceaeraspásof aircraft etcíochtarmasc1cmuthe underbelly of an aeroplaneíochtar eitleáin3literary useúsáid litearthaunderworldthe seedy underbelly of the cityan taobh gránna den chathair4literary useúsáid litearthavulnerable partthe soft underbelly of the gangball bog na droinge