What does uphold mean?

[Orly]

English Language Tests, Intermediate level

ESL/EFL Test #266 "Irregular Verbs Test (14)", question 3

The teachers at your school must ......... the rules set out by the state.

(a) uphold
(b) upheld
(c) upholding

English Language Tests, Intermediate level

ESL/EFL Test #266 "Irregular Verbs Test (14)", answer 3

The teachers at your school must uphold the rules set out by the state.

Correct answer: (a) uphold
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what does uphold mean?

Orly

[Yankee]

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I'd say that the intended meaning of uphold in this sentence is maintain.
http://dictionary.cambridge.org/define.asp?key=87325&dict=CALD
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Amy
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ESL teacher, translator, and a native speaker of American English