to stop; a stop
The man stops the lady, usually as she steps crossing back in back ochos or molinete, with pressure inward at the lady's back and at her balance hand and with a slight downward thrust, preventing further movement. When properly led the lady stops with her feet extended apart, front and back, and her weight centered. The man may extend his foot to touch her forward foot as an additional cue and element of style or he may pivot and step back to mirror her position (fallaway).
(from batango.com (http://www.batango.com/Loomis.htm))
The parada refers to a move in which one partner's foot appears to stop the other partner, usually followed by a change of direction.
(from layuega.com (http://www.layuega.com/parada.htm))
parada: a stop, often a "sandwich"
(from danieltrenner.com (http://www.danieltrenner.com/daniel/ar_vocab.html))