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adjective

bueno

/bwˈenas/

feminine plural form of bueno

good; also used as a standalone greeting ("hi / good [morning/afternoon/evening]")

Definitions

  1. 1

    Good (feminine plural attributive/predicative adjective, describing nouns that are feminine and plural)

    “Estas son las buenas noticias que esperábamos escuchar hoy.”

    These are the good news that we were hoping to hear today.

  2. 2

    Hi / Hello (informal greeting, short for 'buenas tardes', 'buenas noches', or 'buenos días')

    “Cuando llegó a la oficina, saludó a todos con un simple '¡buenas!'.”

    When she arrived at the office, she greeted everyone with a simple 'hi!'.

  3. 3

    Good, kind, well-behaved (describing people or actions as morally good or kind, feminine plural)

    “Las personas buenas siempre intentan ayudar a los demás sin pedir nada.”

    Good people always try to help others without asking for anything.

Word forms

Gender
feminine
Plural
buenas (the lemma 'bueno' has four forms: bueno, buena, buenos, buenas)
Usage
Masculine singular shortens to 'buen' before a noun (e.g. 'buen día'), but the full feminine/plural forms do not shorten.

As a standalone greeting, '¡buenas!' is very common in casual, everyday Spanish across Latin America and Spain — it is a relaxed, friendly alternative to the fuller time-specific greetings ('buenos días', 'buenas tardes', 'buenas noches').