Completion of the first phase of an activity.
The base after home plate in a counter-clockwise path around a baseball infield.
Kissing, regarded as the first phase of a sexual relationship.
The betting spot located immediately to the left of the dealer, which is first to receive cards and first to act.
A fractional part of an integer ending in one
An ordinal value that is represented by an expression ending in 1 such as the (n + 1)th.
'first', or other ordinal derivatives of 'one', such as hundred-and-oneth or minus-oneth
Used at the end of algebraic expressions indicating ordinal position that end in 1, such as (k+1)ᵗʰ