1. a putting together, composition , (Aristotle Philosopher); ς. προσώπου a studied expression of countenance, of Pericles, (Plutarch)

2. a bringing together, introduction, recommendation , (Polybius Historicus)

3. συνίσταμαι); a standing together, meeting : in hostile sense, close combat, conflict , (Herdotus Historicus); metaphorically, ς. γνώμης a conflict of mind, intense anxiety, (Thucydides)

4. a meeting, a knot of men , (Euripides); κατὰ ξυστάσεις γιγνόμενοι forming into knots , (Thucydides): a political union , (Demosthenes Orator)

5. friendship or alliance , (Polybius Historicus): a conspiracy , (Plutarch)

6. construction, structure, constitution , (Plato Philosophus): absolute a political constitution , (Plato Philosophus)

7. metaphorically of the mind, ς. φρενῶν contraction, sternness, sullenness , (Euripides) (ML)