D defs.my
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Entry 3 senses · 3 variants Webster, 1913

Undulate

/ŭn'-jəl-ātˌ/ · Un·du·late · IPA /ˈʌndjəleɪt/
01 a. Same as Undulated.
  1. 1.
    Same as Undulated. See: Undulated
02 v. t. To cause to move backward and forward, or up and down, in undulations or waves; to cause to vibrate.
imp. & p. p. Undulated; p. pr. & vb. n. Undulating
  1. 1.
    To cause to move backward and forward, or up and down, in undulations or waves; to cause to vibrate.
    “Breath vocalized, that is, vibrated and undulated.” — Holder.
03 v. i. To move in, or have, undulations or waves; to vibrate; to wave; as, undulating air.
  1. 1.
    To move in, or have, undulations or waves; to vibrate; to wave; as, undulating air.