across [əˈkrɒs]
When across is an element in a phrasal verb, eg come across, run across, look up the verb.
preposition
1 (from one side to other of) a través de
a tree had fallen across the road había caído un árbol a través de la carretera; to go across a bridge atravesar or cruzar un puente; to run across a road cruzar una calle corriendo; the bridge across the Tagus el puente sobre el Tajo; with arms folded across his chest con los brazos cruzados sobre el pecho
adverb
1 (from one side to the other) a través; al través
don't go around, go across no des la vuelta, ve al través; shall I go across first? ¿paso yo el primero?; to run across (over bridge) atravesar or cruzar corriendo; to swim across atravesar a nado; to cut sth across cortar algo por (el) medio; a plank had been laid across habían colocado una tabla encima; he helped an old lady across ayudó a una señora mayor a cruzar la calle
2 (on opposite side)
it's across from the Post Office está enfrente de Correos; he sat down across from her se sentó frente a ella