ENGLISH
REFERENCE

officially

adv.
US //əˈfɪʃəɫi// UK //əfˈɪʃəlˌi// of·fi·cial·ly
  1. 1 formally (adv.)
    B1 Intermediate

    in a formal way, usually by a person in authority or according to the law.

    in a formal or authorised manner; according to established rules or public declaration.

    Example

    The new library was officially opened by the mayor yesterday morning.

    Example

    Although the two companies had been collaborating for months, the merger was only officially announced to the press this morning.

    Usage

    Typically modifies verbs related to communication or starting a process.
  2. 2 definitely or completely (adv.)
    B2 Upper Intermediate Informal

    used to say that something is now definitely true or has really happened.

    used as an intensifier to confirm that a situation or state has reached a definitive point.

    Example

    It is officially too cold to go outside without a heavy coat.

    Example

    After three hours of waiting in the rain for the bus, I am officially done with this city.

    Teacher's tip

    This sense is common in spoken English to add emphasis to a personal opinion or a frustrating situation.
Origin

From official + -ly.

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