It is quite easy to define trochee. As it has been already mentioned, trochee has two syllables, the first one is stressed, the second – unstressed: –U.
Double, double toil and trouble;
Fire burn, and caldron bubble.
Scale of dragon; tooth of wolf;
Witches’ mummy; maw and gulf…”
Macbeth by Shakespeare
And the Raven, never flitting, still is sitting, still is sitting
On the pallid bust of Pallas just above my chamber door;
And his eyes have all the seeming of a demon’s that is dreaming,
And the lamp-light o’er him streaming throws his shadow on the floor;
And my soul from out that shadow that lies floating on the floor
Shall be lifted—nevermore!
The Raven by Edgar Allan Poe