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EXPA'TIATE, verb intransitive [Latin 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