The meaning of laughing

1. My father, may Allah grant him mercy, said: We were told by Sa’d bin Abdullah, from Ya’qoub bin Yazid, from Ibn Abi ‘Umayr, from Abdul-Rahman bin Hajjaj, from Abu Abdillah, peace be upon him, with regards to the saying of Allah, Exalted and Glorious is He: «Then she laughed, and we gave her a glad tiding with Ishaq.» (11:71) He said