Chemical equations are balanced for mass and charge, meaning the number and type of atoms on the left side of the arrow is the same as the number of type of atoms on the right side of the arrow. 1  The overall electrical charge on the left side of the equation is the same as the overall charge on the right side of the equation.
1 : grown too big overgrown boys. 2 : covered with plants that have grown in an uncontrolled way an overgrown path.
something that obstructs or hinders progress. Obstacle, obstruction, hindrance, impediment refer to something that interferes with or prevents action or progress. An obstacle is something, material or nonmaterial, that stands in the way of literal or figurative progress: Lack of imagination is an obstacle to one's advancement. An obstruction is something that more or less completely blocks a passage: A blood clot is an obstruction to the circulation.