Can Caitlyn's Yordle trap stop Master Yi while he is meditating?

Solution 1:

The Yordle Trap is a rooting CC which does not stop channeled abilities or attacks.

Although it doesn't stop his Meditate it will prevent him from using Alpha Strike while rooted, so it will still be helpful in taking down Master Yi once his Meditate ends.

Highlander also only stops slows so I'm not sure what that has to do with this situation.

Solution 2:

Hopefully for me, a Master Yi player, it doesn't!

Yi's Meditate can only be interrupted by a hard crowd control like a stun or knock-up. Cait's Yordle Trap only keeps people from moving.

To complete my answer, here are all the effects that can interrupt Yi's Meditate:

• Knock-ups (Blitzcrank's Power Fist E)
• Taunt (Ahri's Charm E, Rammus's Frenzying Taunt E)
• Fear (Fiddlestick's E)
• Silence (Soraka's Equinox E)
• Stasis (Bard's Tempered Fate R)
• Stun (Pantheon's Aegis of Zeonia W)
• Suppression (Warwick's Infinite Duress R)

As @VanBuzzKill pointed out, Rooting is not one of them

You can find more informations on crowd controls here.