συναλλαγή συναλλᾰγή, ἡ, an interchange of words for purposes of conciliation, Soph., Eur.: absol. a reconciliation, making of peace, Thuc.: pl. a treaty of peace, Xen. generally, commerce, intercourse, Eur. intervention, δαιμόνων ξυναλλαγαῖς by special interventions of the deities, Soph.; νόσου ξυναλλαγῇ by intervention of disease, Soph.: generally, the issue of intervention, a contingency, incident, Soph.; ὀλεθρίαισι συναλλ. with destructive issues, Soph.