Definition

1. Adjective:
   • Exactly one year old (of a baby): Used specifically to describe a baby who has reached the age of one year.

Usage

• The word đầy tuổi is used exclusively to mark the first birthday of an infant. It is a precise term indicating the completion of the first year of life. It is typically used in celebratory contexts, such as a baby's first birthday party ().

Examples

• Adjective:
  • Cháu bé đã đầy tuổi. (The baby is exactly one year old.)
  • Gia đình tổ chức tiệc mừng ngày cháu đầy tuổi. (The family is holding a party to celebrate the baby's first birthday.)

Advanced Usage

• "Ngày đầy tuổi": The first birthday celebration.
  • Ngày đầy tuổi của em bé rất vui. (The baby's first birthday celebration was very joyful.)

Variants and Related Words

• Tròn một tuổi: A more common, synonymous phrase meaning "turned one year old."
• Thôi nôi: A traditional Vietnamese ceremony held for a baby on their first birthday. While đầy tuổi describes the age, thôi nôi refers to the specific ritual.
• Sinh nhật một tuổi: Birthday party for a one-year-old.

Synonyms

• Tròn một tuổi: Exactly one year old.
• Một tuổi: One year old (less precise, can mean any time during the second year of life).

Notes

• đầy tuổi is not used for ages beyond one year. For older children or adults, phrases like tròn [số] tuổi (e.g., - exactly 10 years old) or đủ tuổi (of legal age) are used.
• It carries a connotation of a milestone and is often associated with celebration and good wishes for the child's future.

1. Exactly one year old (of a baby)