perpendicular adj.

1 pointing straight up

VERBS be

ADV. almost, nearly an almost perpendicular staircase

2 at an angle of 90° to sth

VERBS be

ADV. exactly | almost | mutually two mutually perpendicular directions

PREP. to The axis of the moon will now be exactly perpendicular to that of the earth.

You can also check other dicts: perpendicular (English, 中文解释 ), wordnet sense, Collins Definition

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