1 adjective in or towards the southeastthoir theasthe southeastern part of the countryan chuid thoir theas den tír, oirdheisceart na tírethe southeastern boundaryan teorainn thoir theasthey went in a southeastern directionchuaigh siad soir ó dheas2 adjective of the southeast(de chuid) an oirdheiscirtthe southeastern dialectcanúint an oirdheiscirt