(=change) changement m , modification f
timetable subject to alteration horaires sujets à modifications
an alteration to sth [+rules, programme, timetable, arrangements] un changement à qch
→ There were a few minor alterations to the menu.
to make an alteration to sth [+rules, programme, timetable, arrangements] apporter une modification à qch
→ We cannot make any alterations to these arrangements.
→ Making some simple alterations to your diet will make you feel fitter.