To be overjoyed or pleasantly surprised by an unexpected good fortune.
望希望，意料。由于没有想到的好事而非常高兴。
宋·苏轼《与李之仪书》契阔八年，岂谓复有见日？渐近中原，辱书尤数，喜出望外。”
She was overjoyed when she heard she got the job.
Learn the next connected idiom: 喜出望外 (xǐ chū wàng wài) → 外强中干 (wài qiáng zhōng gān)
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