intransitive. To swing to and fro, esp. at the end of a rope; figurative to waver, vacillate. Obsolete.

intransitive. To move freely backwards and forwards, as a body suspended from a support above; to oscillate below a point of support, as a pendulum…

Of a pendulum, etc.: to swing to and fro; to oscillate.

intransitive. To dangle, sway to and fro; to oscillate.

intransitive. To swing; to hang, be suspended. dialect.

intransitive. To hang or swing like a pendulum (also figurative). Frequently (Mountaineering) to swing on a rope so as to acquire the momentum to…

to play pendulum: to swing or oscillate like a pendulum (literal and figurative). Obsolete. rare.