It's the class bell. The pupils that had been around the school gate quickened their steps as one.
She has a well-proportioned figure.
They stood up simultaneously.
They started all at once.
Everyone in the audience burst into simultaneous laughter.
People started to run all at once.
The newspapers opened fire on the politician.
The passengers came on board all at the same time.
As soon as they realized the mayor was on his way down, his critics started coming out of the woodwork.
All the church bells started ringing together.
I would like to draw your attention to the fact that Kanjisho uses multiple sources of data provided by third parties.
The search results are provided by the wonderful Jisho API which itself uses various data sources which you can find on the jisho's website. The data concerning the kanji strokes are provided by the KanjiVG project, under the CC BY 3.0 FR license. I also use Tatoeba to provide example sentences and Kuroshiro to obtain the furiganas and romajis versions of the sentences.
If you find any vices, errors or malfunctions, please let me know so that I can correct them.