I. si‧phon¹ (also syphon British English) /ˈsaɪfən/ noun [countable]
[Date: 1300-1400; Language: French; Origin: Latin sipho 'pipe, tube', from Greek siphon]

1. a bent tube used for getting liquid out of a container, used by holding one end of the tube at a lower level than the end in the container

2. (also soda siphon) a type of bottle for holding soda water, which is forced out of the bottle using gas pressure

[TahlilGaran] Dictionary of Contemporary English ▲

II. siphon² (also syphon British English) verb [transitive always + adverb/preposition]

1. (also siphon something ↔ off/out) to remove liquid from a container by using a siphon:
It took him only a few minutes to siphon off the petrol and drive away.
siphon something out of/from something
Crews began siphoning oil from the leaking boat.

2. (also siphon something ↔ off) to dishonestly take money from a business, account etc to use it for a purpose for which it was not intended:
Emergency aid was siphoned off by foreign ministry officials for their own use.
siphon something from something
I found she had siphoned thousands of dollars from our bank account.

[TahlilGaran] Dictionary of Contemporary English ▲

III. sy‧phon /ˈsaɪfən/ noun [countable]
a British spelling of siphon

[TahlilGaran] Dictionary of Contemporary English ▲