sterile adj.
1 completely clean
VERBS be | become | remain | make sth | keep sth This top fits over the bottle and keeps the teat sterile.
ADV. completely | virtually
2 not able to produce young animals/babies
VERBS be | become | remain | leave sb, make sb
ADV. permanently Male workers were made permanently sterile by this pesticide.
3 with no interest or life
VERBS be | become, grow Their relationship had grown sterile over the years.
ADV. very | increasingly the increasingly sterile debate on constitutional reform | largely | rather, somewhat
You can also check other dicts: sterile (English, 中文解释 ), wordnet sense, Collins Definition