expatiate

EXPA'TIATE, v.i. [L. expatior; ex and spatior, to wander, to enlarge in discourse, spatium, space, probably allied to pateo, to open.

1. To open at large; to rove without prescribed limits; to wander in space without restraint.

He bids his soul expatiate in the skies.

Expatiate free o'er all this scene of man.

2. To enlarge in discourse or writing; to be copious in argument or discussion. On important topics the orator thinks himself at liberty to expatiate.