Definitions:

1. A sense of purity, simplicity, or vulnerability akin to that of a baby. ADJECTIVE
   • There was a baby-like innocence in the way she trusted people.
2. Actions or responses that mimic those of a baby, such as crying, cooing, or displaying naivety. ADJECTIVE
   • He had a baby-like giggle that made everyone smile.
3. Describes characteristics, features, or behaviors that resemble those of a baby. ADJECTIVE
   • His baby-like expressions of joy and surprise were endearing to everyone around him.

Synonyms:

• babyish
• childish
• Immature
• infantile
• naive
• puerile