astheyarrived
phraseUK /æz ðeɪ əˈraɪvd/
US /æz ðeɪ əˈraɪvd/
At the moment they got to a place.
As they arrived, the band started to play.
OTHER MEANINGS
2. At the same time as they showed up.
As they arrived, everyone clapped.
3. Just after they got to the place.
As they arrived, the rain began to fall.
4. While they were coming into the place.
As they arrived, they waved to their friends.