Real Dictionary

puff
If you are puffing, you are breathing loudly and quickly with your mouth open because you are out of breath after a lot of physical effort.
countable noun: A puff for something such as a book, film, product, or organization is something that is done or said in order to attract people's attention and tell them how good it is.
countable noun: A puff is the same as a poof.
countable noun: A puff of something such as air or smoke is a small amount of it that is blown out from somewhere.
verb: If an engine, chimney, or boiler puffs smoke or steam, clouds of smoke or steam come out of it.
verb: If someone puffs at a cigarette, cigar, or pipe, they smoke it.
verb: If you puff smoke or moisture from your mouth or if it puffs from your mouth, you breathe it out.

puff in American English
a short, sudden burst or gust, as of wind, or an expulsion, as of breath
to blow in puffs, as the wind
to blow, drive, give forth, etc. in or with a puff or puffs
intransitive verb: to blow with short, quick blasts, as the wind
noun: a short, quick blast, as of wind or breath
transitive verb: to send forth (air, vapor, etc.) in short, quick blasts

puff in British English
noun: a short quick draught, gust, or emission, as of wind, smoke, air, etc, esp a forceful one