1. To meet at breast level.
2. To reach the summit.

1. To be incompatible; be or come into conflict; SYN. jar, collide.
2. To disagree violently.

ETYM Latin collidere, collisum; col- + laedere to strike. Related to Lesion.
1. To cause to collide.
2. To crash together with violent impact; SYN. clash.

To happen simultaneously; SYN. coincide.

To move with or as if with a rushing sound.

ETYM Recent.
1. To crush together, as of cars in a collision.
2. To make smaller or shorter.