1. superlative form of jealous; most jealous; feeling the most resentment or anger toward a rival or competitor
Usage: archaic or poetic superlative; modern English typically uses 'most jealous' instead
2. superlative form of jealous; most protective or vigilant in guarding something valued
Usage: archaic or poetic superlative

Examples

• He was the jealousest of all her suitors, always watching her closely.
• She remained the jealousest guardian of her family's secrets.
• Among the rivals, he proved the jealousest of his position.
• The jealousest lover cannot control another's heart.
• Of all the competitors, she was the jealousest of her reputation.