mask

²mask

vt

Definition of MASK

1

: to prevent (an atom or group of atoms) from showing its ordinary reactions <to mask hydroxyl in a sugar by converting it into methoxyl>

2

: to modify or reduce the effect or activity of (as a process or a reaction)

3

: to make indistinct or imperceptible <flavorings used in pharmacy to mask the taste of medications>

4

: to raise the audibility threshold of (a sound) by the simultaneous presentation of another sound