Un"da*ted (?), a. [L. undatus, p. p. of undare to rise in waves, to wave, to undulate, fr. unda a wave. See Undulate.] (Bot.) Rising and falling in waves toward the margin, as a leaf; waved.

Un*dat"ed (?), a. [Pref. un- + dated.] Not dated; having no date; of unknown age; as, an undated letter.

Un"da*ted (?), a. [L. undatus, p. p. of undare to rise in waves, to wave, to undulate, fr. unda a wave. See Undulate.] (Bot.) Rising and falling in waves toward the margin, as a leaf; waved.

Un*dat"ed (?), a. [Pref. un- + dated.] Not dated; having no date; of unknown age; as, an undated letter.

• not marked with a date
  
• of a style that will not go out of fashion; a classic