upright adj.
VERBS be, sit, stand rows of children sitting upright at their desks | come, jerk, scramble, shoot, spring, struggle Slowly the boat came upright. Polly jerked upright, wild-eyed and blinking. | remain, stay The flag pole wouldn't stay upright. | drag sb/sth, haul sb/sth, heave sb/sth, jerk sb/sth, place sth, prop sth, pull sb/sth Pulling himself upright, he squared his shoulders. | hold sb/sth, keep sth
ADV. fully a fully upright posture | almost | relatively | rigidly, stiffly She held herself rigidly upright.
PHRASES sit/stand bolt upright (= to sit/stand with your back straight) He was sitting bolt upright on his chair, looking very tense.
You can also check other dicts: upright (English, 中文解释 ), wordnet sense, Collins Definition