ideally UK /aɪˈdɪə.li/US /aɪˈdi.ə.li/ adverb2 •In an ideal way; perfectly.The summit of Mauna Kea is considered the ideal place to mount an astronomical observatory, for above the clouds there is only the stars and the skies are ideally transparent. — 2004 •Given ideal circumstances; preferably.Ideally, we would have one textbook per student, but unfortunately some of you will have to share. formsmore ideally · most ideally