1. An issue whose settlement is more important than anything else; and issue that must be settled before anything else can be settled

Type of: issue

• Anzac
• Anzio
• ao dai
• aorist
• aoristic
• aorta
• aortal
• aortic
• aortic aneurysm
• aortic arch
• aortic orifice
• aortic plexus
• aortic stenosis
• aortic valve
• aortitis
• Aotus
• Aotus trivirgatus
• aoudad
• apace
• apache
• apache dance
• apache devil dance
• apadana
• Apalachicola
• Apalachicola River