This is the 11256th most frequent Catalan word.
topada
A collision or clash.
Here 'topada' refers to a collision or impact, specifically between vehicles.
La topada entre els dos cotxes va causar un embús al trànsit.
The collision between the two cars caused a traffic jam.
In this sentence, 'topada' is used to describe an unexpected encounter or meeting between individuals.
Ahir vaig tenir una topada inesperada amb un vell amic al carrer.
Yesterday I had an unexpected encounter with an old friend in the street.
'Topada' in this context indicates a clash or confrontation of differing ideas or opinions, metaphorically.