a harmful microorganism, typically a bacterium

their ham was found to be contaminated with food bugs

a small insect

a thick green scum which crawls with bugs, centipedes, and worse

an insect of a large order distinguished by having mouthparts that are modified for piercing and sucking

a concealed miniature microphone, used for secret eavesdropping or recording

they cleaned out the bugs and wiretaps

an error in a computer program or system

a custom program we used developed a bug

conceal a miniature microphone in (a room or device) in order to listen to or record someone's conversations secretly

their offices, homes, and telephones were bugged

annoy or bother (someone)

a persistent reporter was bugging me