1 adjective in or towards the northwestthiar thuaidh c m uthe northwestern part of the countryan chuid thiar thuaidh den tír, iarthuaisceart na tírethe northwestern boundaryan teorainn thiar thuaidhthey went in a northwestern directionchuaigh siad siar ó thuaidh2 adjective of the northwest(de chuid) an iarthuaiscirtthe northwestern dialectcanúint an iarthuaiscirt