1 lowest part of sth
ADJ. false a case with a false bottom
VERB + BOTTOM arrive at, fall to, get to, reach, sink to He reached the bottom of the steps in no time. The boat sank to the bottom of the sea. | touch She could only just touch the bottom (= of a swimming pool, etc.).
BOTTOM + NOUN end, half
PREP. along the ~ We rode along the bottom of the valley. | at the ~ at the bottom of the hill | from the ~ strange sounds from the bottom of the well | in the ~ in the bottom of my bag | on the ~ on the bottom of the box | near/towards the ~ near the bottom of the page
2 least important position
VERB + BOTTOM start at, work up from He started at the bottom and worked his way up through the company.
PREP. at the ~, near/towards the ~ He's near the bottom of the class.
3 part of the body
VERB + BOTTOM smack
4 basic cause of sth/truth about sth
VERB + BOTTOM be at, lie at I'd love to know what lies at the bottom of all this. | get to The only way to get to the bottom of it is to confront the chairman.