on-board - palubní
BrE
/ˌɒn'bɔ:d/
AmE
/ˌɑ:n'bɔ:rd/

adjective - installed or integrated into a vehicle

 
keen on - nadšený do, vášnivý pro, zapálený do
BrE
/'ki:n ɒn/
AmE
/'ki:n ɑ:n/

adjective - liking to do something very much

 
on-key - nefalešný (hudebně), čistý (o tónech)
BrE
/ˌɒn'ki:/
AmE
/ˌɑ:n'ki:/

adjective - in tune, containing the correct musical notes, musically pleasing

 
on balance - po zvážení
BrE
/ɒn 'bæləns/
AmE
/ɑ:n 'bæləns/

adverb - after considering all the factors

 
add-on - doplněk, přídavek
BrE
/'ædˌɒn/
AmE
/'ædˌɑ:n/

noun - something that is added to something else, such as a new part of a computer program, computer game etc.

 
on average - průměrně
BrE
/ˌɒn'ævərɪdʒ/
AmE
/ˌɑ:n'ævərɪdʒ/

adverb - usually, typically

 
later on - později
BrE
/ˌleɪtər'ɒn/
AmE
/ˌleɪt̬ər'ɑ:n/

adverb - not now, sometime in the future but not now

 
on file - v záznamech, v evidenci
BrE
/ɒn 'faɪl/
AmE
/ɒn 'faɪl/

adverb - kept as a written record on a computer or on paper

 
carry-on - příruční (např. zavazadlo)
BrE
/'kæriɒn/
AmE
/'keriɑ:n/

adjective, American English - (of luggage) small and possible to be carried onto a plane with you

 
on fire - v plamenech
BrE
/ɒn'faɪə/
AmE
/ɑ:n'faɪər/

adverb - burning, in flames

 
on cue - v pravý okamžik
BrE
/ɒn'kju:/
AmE
/ɑ:n'kju:/

adverb - exactly at the time that is expected or needed

 
on time - přesně na čas
BrE
/ɒn'taɪm/
AmE
/ɑ:n'taɪm/

adverb - exactly at the time

 
on holiday - na prázdninách, na dovolené
BrE
/ɒn'hɒlədeɪ/
AmE
/ɑ:n'hɑ:lədeɪ/

adverb - travelling or relaxing somewhere during the period when you do not have to go to school or to work

on duty
on duty - ve službě
BrE
/ɒn'dju:ti/
AmE
/ɑ:n'du:t̬i/

adverb - working at the moment

 
on board - na palubě
BrE
/ɒn'bɔ:d/
AmE
/ɑ:n'bɔ:rd/

adverb - on a ship etc.