garrulous [ˈgærələs, ˈgæryə-] a.
1.) Talking much, especially about commonplace or trivial things; talkative; loquacious.
2.) (Zool.) Having a loud, harsh note; noisy; said of birds; as, the garrulous roller.
Usage: A garrulous person indulges in long, prosy talk, with frequent repetitions and lengthened details; talkative implies simply a great desire to talk; and loquacious a great flow of words at command. A child is talkative; a lively woman is loquacious; an old man in his dotage is garrulous (GNU Collaborative International Dictionary of English).
Etymology: From Latin garrulus, from garrire, to chatter.
"Then thought the Queen, 'Lo! they have set her on,
Our simple-seeming Abbess and her nuns,
To play upon me,' and bowed her head nor spake.
Whereat the novice crying, with clasped hands,
Shame on her own garrulity garrulously,
Said the good nuns would check her gadding tongue
Full often, 'and, sweet lady, if I seem
To vex an ear too sad to listen to me,
Unmannerly, with prattling and the tales
Which my good father told me, check me too
Nor let me shame my father's memory, one
Of noblest manners, though himself would say
Sir Lancelot had the noblest; and he died,
Killed in a tilt, come next, five summers back,
And left me; but of others who remain,
And of the two first-famed for courtesy
And pray you check me if I ask amiss
But pray you, which had noblest, while you moved
Among them, Lancelot or our lord the King?'" (Idylls of the King, Alfred Tennyson, 1885).