Unannounced: meaning, definitions and examples

Best used when referring to someone or something arriving or happening without prior notice, typically in formal or semi-formal scenarios.

• She showed up to the meeting unannounced
• The inspector made an unannounced visit to the factory

Appropriate for describing events or outcomes that are not anticipated, often neutral but can lean toward negative or positive connotations depending on the situation.

• Her arrival was completely unexpected
• The company faced unexpected challenges after the merger

Used when something happens unexpectedly and catches people off guard, can be positive, neutral, or negative depending on the context.

• He planned a surprise party for her birthday
• The sudden rainstorm was a surprise for everyone

Ideal for situations where something is done without preparation or planning, often used in creative or casual contexts.

• The students held an impromptu performance in the park
• We had an impromptu picnic after work