To reduce to nothing, to destroy, to eradicate.
To render null and void; to abrogate.
To react with antimatter, producing gamma radiation and (for higher-mass reactants, especially composite particles such as protons) lighter particles (such as pions, muons, and neutrinos).
To be knocked down or laid low.
To reduce (a data structure) to one that has fewer dimensions, e.g. a 2×2 array into a list of four elements.
To press one's body tightly against a surface, such as a wall or floor, especially in order to avoid being seen or harmed.
To knock down or lay low.
To make something flat or flatter.
To lower by a semitone.
To combine (separate layers) into a single image.
To become flat or flatter; to plateau.
To make vapid or insipid; to render stale.