Wel·ter v. i. [imp. & p. p. Weltered p. pr. & vb. n. Weltering.]
 1. To roll, as the body of an animal; to tumble about, especially in anything foul or defiling; to wallow.
    When we welter in pleasures and idleness, then we eat and drink with drunkards.   --Latimer.
    These wizards welter in wealth's waves.   --Spenser.
 He must not float upon his watery bier
 Unwept, and welter to the parching wind,
 Without the meed of some melodious tear.   --Milton.
    The priests at the altar . . . weltering in their blood.   --Landor.
 2. To rise and fall, as waves; to tumble over, as billows.  “The weltering waves.”
    Waves that, hardly weltering, die away.   --Wordsworth.
    Through this blindly weltering sea.   --Trench.