From The Collaborative International Dictionary of English v.0.48 :
checkout \checkout\ n.
1. the latest time for vacating a hotel room without being
charged for extra time; as, the checkout here is 12 noon.
Syn: checkout time.
[WordNet 1.5]
2. A counter in a supermarket or other retail store where one
pays for one's purchases.
Syn: checkout counter.
[WordNet 1.5]
From WordNet (r) 3.0 (2006) :
checkout
n 1: the act of inspecting or verifying; "they made a check of
their equipment"; "the pilot ran through the check-out
procedure" [syn: check, checkout, check-out
procedure]
2: the latest time for vacating a hotel room; "the checkout here
is 12 noon" [syn: checkout, checkout time]
3: a counter in a supermarket where you pay for your purchases
[syn: checkout, checkout counter]