Noun

(en noun)

A measured portion of medicine taken at any one time.

The quantity of an agent (not always active) substance or radiation administered at any one time.

*{{quote-magazine, date=2014-04-21, volume=411, issue=8884, magazine=(The Economist)

, title= Subtle effects , passage=Manganism has been known about since the 19th century, when miners exposed to ores containing manganese

A venereal infection.

* 1978 , (Lawrence Durrell), Livia'', Faber & Faber 1992 (''Avignon Quintet ), p. 382:

It would be very expensive to cure a dose here, as well as unbelievably painful.

Noun

(en noun)

A period devoted to a particular activity.

a training session

"Are we having a recording session'''?" / "Yes. We've even got some '''session musicians to provide some brass."

*

A meeting of a council, court, or legislative body to conduct its business.

This court is now in session .

(computing) The sequence of interactions between client and server, or between user and system; the period during which a user is logged in or connected.

Logging out or shutting down the computer will end your session .

(cricket) Any of the three scheduled two hour playing sessions, from the start of play to lunch, from lunch to tea and from tea to the close of play.

(obsolete) The act of sitting, or the state of being seated.

* Hooker

So much his ascension into heaven and his session at the right hand of God do import.

* Tennyson

But Vivien, gathering somewhat of his mood, / Leaped from her session on his lap, and stood.