Dictionary term
Synastry
Direct answer
Synastry is relationship astrology that compares two birth charts to study attraction, friction, compatibility, timing, projection, and mutual activation.
Synastry compares two charts to interpret relationship dynamics.
- Source
- The Great Almanac Dictionary
- Category
- Astrology
- Also appears in
- Astrology
- Aliases
- relationship astrology
- Last updated
- 2026-07-15
Quick reference
- Use when
- Use Synastry for romantic, friendship, family, business, mentorship, and client questions where two charts interact.
- Do not use it for
- Do not use Synastry to decide someone's worth or force a relationship conclusion.
- Reference category
- Astrology
- Related terms
- Birth Chart, Composite Chart, Venus, Mars
The story behind Synastry
Chart comparison is a longstanding astrological practice, with modern synastry adding psychological relationship language.
Synastry in spiritual tradition
Spiritually, Synastry asks what relationship reveals, heals, mirrors, or matures.
The Great Almanac frames Synastry with educational restraint. Mystical or symbolic language may be meaningful, but it should not be exaggerated into certainty, panic, or permission to ignore ordinary responsibility.
Synastry in the Bible
In biblical history, celestial bodies are understood as markers of "signs and seasons" within the created order, rather than independent powers or arbiters of destiny. A thoughtful biblical perspective values the beauty of the stars while drawing a clear line between symbolic reflection and the ultimate authority of God, prayer, conscience, and wise counsel. This ensures that personal discernment always takes precedence over planetary placements.
Synastry in astrology
Synastry reads contacts between planets and points across two charts, especially the Moon, Venus, Mars, Saturn, angles, nodes, and house overlays.
Why Synastry matters
Synastry matters because real compatibility is not Sun-sign matching. It shows what each person activates in the other: affection, irritation, safety, desire, responsibility, growth, and blind spots.
Example in a reading: One person's Mars on another person's Moon may bring chemistry, irritation, protection, or emotional urgency depending on the whole chart.
Interpretive caution: Do not use Synastry to decide someone's worth or force a relationship conclusion.
How Synastry is used in a reading
Use Synastry for romantic, friendship, family, business, mentorship, and client questions where two charts interact.
Where interpretation stops
Synastry is shared here as an educational reference to support study, contemplation, and personal discernment. It is designed to inspire self-reflection but is never a substitute for professional medical, legal, financial, or personal advice. By treating mystical traditions as rich symbolic languages rather than absolute rules, we focus on fostering wisdom, clarity, and personal responsibility.
Sources and editorial method
This concise reference separates established definitions from historical, symbolic, or interpretive claims. Entries without external references are presented as editorial summaries rather than primary-source scholarship.
The page starts with a direct definition, then separates use, example, caution, spiritual meaning, and historical context. For astrology, occult, demonology, curse, and spiritual warfare terms, the editorial rule is to explain the term without making fear-based, fatalistic, medical, legal, financial, or ritual-instruction claims.
Personalized next step
See how Synastry connects to your own birth chart, numerology, spiritual timing, and personal almanac.
Cast your natal chartRelated terms
These related entries help place Synastry inside a wider reference cluster instead of leaving it as a standalone keyword.
