Answer:

delimit

Answer	Crossword Clue
DELIMIT	Define
DELIMIT	Separate into fields
DELIMIT	Fix the boundaries of

DELIMIT	Separate by commas, perhaps
DELIMIT	Set the boundaries of
DELIMIT	Bound.
DELIMIT	Establish bounds
DELIMIT	Put boundaries on
DELIMIT	Set boundaries
DELIMIT	Mark the boundaries of
DELIMIT	Bound

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.