un‧du‧late /ˈʌndjəleɪt, ˈʌndjʊleɪt $ -dʒə-/
verb [intransitive] formal to move or be shaped like waves that are rising and falling:
undulating hills—undulation /ˌʌndjəˈleɪʃ
ən, ˌʌndjʊˈleɪʃ
ən $ -dʒə-/
noun [uncountable and countable] [TahlilGaran] Dictionary of Contemporary English ▲