bug noun
1 infectious illness
ADJ. nasty | flu, stomach, tummy
VERB + BUG have | catch, come/go down with, get, pick up
BUG + VERB go around/round A stomach bug has been going round at school. | strike sb down
PREP. with a/the ~ off work with a flu bug > Special page at ILLNESS
2 sudden interest in sth
VERB + BUG be bitten by, catch, get She's been bitten by the travel bug.
BUG + VERB bite (sb)
3 sth wrong in a system/machine
ADJ. minor, slight | computer, software
You can also check other dicts: bug (English, 中文解释 ), wordnet sense, Collins Definition