pillar noun
ADJ. massive, solid, squat | supporting | concrete, marble, stone
PILLAR + VERB hold sth up, support sth The roof is supported by eight massive stone pillars.
PREP. behind a/the ~ I hid behind a pillar when I saw my former teacher. | ~ of a pillar of rock/smoke
You can also check other dicts: pillar (English, 中文解释 ), wordnet sense, Collins Definition