1 lowest part
ADJ. firm, solid, strong
VERB + BASE have The statue has a solid concrete base.
2 original idea/situation
ADJ. firm, secure, solid, sound, strong | economic, ideological His arguments have a sound economic base.
VERB + BASE have | establish, give sb, provide (sb with) These policies give us a solid base for winning the next election. | use sth as
PREP. ~ for He used the notes as a base for his lecture.
3 of support/income/power
ADJ. solid, sound | broad, narrow These policies have a broad base of support. | power a politician with a rural power base | commercial, economic, financial, industrial, manufacturing, tax The country has a sound commercial base. | client, customer
VERB + BASE have | develop, expand, improve, increase The company is trying to expand its customer base.
BASE + VERB grow | shrink
4 main place
ADJ. excellent, ideal, perfect
VERB + BASE have The company has its base in New York. | establish, set up The company has set up its new base in the north.
BASE + NOUN camp
PREP. ~ for an ideal base for mountain expeditions
5 military centre
ADJ. foreign Demonstrators demanded the removal of foreign bases. | air, air force, military, missile, NATO, naval, RAF
VERB + BASE have | build, establish The Americans established a naval base on the island in the 1960s.
PREP. at a/the~ equipment kept at the base | on a/the ~ people living on the air force base | to (the) ~ The planes have all returned to base.
base verb PHRASAL VERBS base sth on/upon sth
ADV. closely, firmly | broadly, loosely The novels are all loosely based on the author's life. | largely Their research was based largely on anecdotal evidence.