definite accusative singular of ви́рус / viruses, viral particles; infectious agents smaller than bacteria / (figuratively) computer viruses, or other harmful or corruptive influences / (biology) virions, individual virus particles / (medicine) viral infections or diseases / (colloquial) bugs, glitches, or failures in software or systems / (slang) memes, trends, or rapidly spreading online content / definite dative plural of ви́рус